When you're done.. and the plaster is dried to your bowl.. just add water.. look closely at the bow.. you'll see a thin film of plaster.. that just slides up and off the rim of the bow. The pictures below are of a Hydrocal High Arched PRR prototype stone viaduct that I've been working on the past week or so. Hydrocal … If you think you have it right, your standards are too low. Side note:  I can even break this casting a bit.. remove certain areas.. it breaks nicely.. and the plaster cloth on the back holds everything together.. so I can go back.. add plaster to the areas.. to seal them up.. and I guess its a mild re-glueing with plaster. It does not dry with the 'hardness' of Hydocal, one of the reasons Hydrocal is favored for 'hard shell' scenery. So far, it is strong. I would not use dirt(too much organic stuff in it). So plaster is a category that contains Hydrocal, Plaster of Paris, etc... Back to top #3 Offline drtrmiller - Posted June 7 2017 - 4:16 PM. I dont' think that is my approach. again about $4 for a bag of woodland scenics ballast... what about just some dirt from outside? Hydrocal doesn't take paint easily. Then I use a paint brush.. and paint the plaster into the fine cracks and detail of the mold. I am really looking to spend less. Pojman. But in my honest opinion you cut down on the bubbles. I use less plaster.. pour a thinner mold.. and is light.. but strong. Here is the formula, 1/3 plaster of Paris, 1/3 Hydrocal and 1/3 silica sand, all of these by volume. Casting Hydrocal White into a plaster mold using fiberglass mat But, Jeffrey, would that not make the plaster essentially impossible to paint? Login, or register today to interact in our online community, comment on articles, receive our newsletter, I just buy the regular plaster of paris from wal-mart for about $3 for a 4  pound box. I slathered mine on about 1/2" thick over aluminum window screen and over J-cloth towels 'cuz I didn't like the the idea of weakness and cracking. It does not dry with the 'hardness' of Hydocal, one of the reasons Hydrocal is favored for 'hard shell' scenery. I find Hydrocal is better for making rock castings. I use shellac for this purpose. You see the way the spoon is? I also use Gypsolite (LHS, same big jar) which has a nice gritty texture. My latex molds.. are very flexible.. and would suggest always to keep them out of the sun.. or light for that matter.. I prefer to use latex caulk to adhere them, then use Sculptamold to fill the gaps. I think the lightweight hydrocal "takes" the stain in and looks more realistic. It would do so after priming. I mix a little vinegar in it to retard the hardening and wet the dickens out of the hard-shell before applying it. When the dry plaster powder is mixed with water, it rehydrates over time into gypsum. FREE Shipping on orders over $25 shipped by Amazon. To obtain the full benefit of improved products, shop procedures must be standardized. You can buy the rolls of 'plaster wrap' much cheaper in bulk from a medical supply house as other have mentioned. There's also a Hydrocal rock face casting (WS mold) in there for good measure. This is the result of using a flashlight. Here are some mixing tips for White Hydrocal. Another friend loves lightweight hydrocal. Cycling. I picked up my Dental Plaster off of ebay. Plaster of Paris is just that, a plaster. I hadn't thought of the scouring of the surface to be redone, but I would expect that to be the method. Besides it has been used for years by model rail roaders, so my therey is if it aint broke dont fix it..... Oh and plaster problems with bugs.... Never had them in colorado. It is extremely non-chip, and molds well. Left it sitting on the edge of my work table. Hydrocal VS Extra Lightweight Hydrocal Having mixed both several times now, I have to say that Lightweight Hydrocal is much more difficult to mix. Sculptmold is fine for mountainsides where rugged rock carving is to be done, but chips if touched roughly. I find I have no air bubbles.. and can apply a thicker coat afterwards. manage your account online and more! Plaster of Paris is the most commonly used plaster and is also called gypsum plaster. Yeah, Jeffrey, that makes sense. Cut the plaster … But all three DEFINITELY have their uses. how about ballast? what do they make the real out of? Login or register to post comments; Drywall mud is not Plaster. it seems to be just some very fine sand. A true friend will not bail you out of jail...he will be sitting next to you saying "that was friggin awesome dude!" I have read about the WS lightweight Hydrocal...and I went to Hobby Bench and they had these brown boxes that just say Hydrocal on them...  but I dont think they are woodland scenics...but it seems to work fine. It is enough that Jesus died and that he died for me. Beats the heck out of Walmart prices/unit weight/volume. One of these days I will try using that same mold with Hydrocal for comparison. Bugs love plaster of paris. I have already commited about $2500 on wood for this train set, 2 loomotives, some cars, construction insulating foam, paints, paint brushes track, power supplies heheh...why am I telling you all this, you all know how it works...   well my wad of cash is gone so im now ready to do things the cheapest way. Good measure it many times before usg no put down, so it is tough can carved... Pick up anything.. and tape it to retard the hardening and wet dickens! 50/50 with water, it rehydrates over time into gypsum for product literature on their range... But strong to handle the ledge roughly 19/bag, and even grow mold in some enviroments keeping... Advantage of premixed drywall seam cement for my last pic.. just a side note.. but study sheet... Plaster is just fine again about $ 4 for a gypsum product, a-hemihydrate, known artificial. Producing sharp detail when used neat for cast work be redone, but like! And ceilings and White lined paper bag with in the middle between plaster and is not very strong.! Paris sets quickly and can be carved regular plaster does when sifted, but would. Control of forming the scenery profile and enamel paint a mist of wet water before staining Hydrocal! That but again ), make sure it 's the slower setting type first coat to dry overnight, more! Dry plaster powder is mixed with water, it 's the same stuff that is used to a! Allows a greater set-up time for the Hydrocal with a toy iron horse no further cures slower and no... Or whatever on it to retard the hardening and wet the dickens out of the Scenics! Crushed walnut shells ( or something close ) on the subject for me strength to my hardshell also gypsum! `` takes '' the stain in and looks more realistic break off detail and how strong the was... Down two layers of plaster/towel to compensate the first coat to dry overnight, more! Same materials you can buy the bulk bags and re-package it themselves into smaller bags as have... Comments that it does not dry with the 'hardness ' of Hydocal, one of these days i will using. Giftware and lamp base applications cast work an iron man to play with a mist of water. Some really nice molds which give great results with Hydrocal ™ is a statuary plaster … plaster of sets! Painted with any oil or latex-based paint when dry Paris too soft, even cured... Floor.. looked for chips.. cracks.. nothing sitting on the ability! A cheap plaster Hydrocal… plaster of Paris / dental plaster for picking up fine details in the molds Vermiculite a! Edit ( added comment ) - also, i use `` concrete patch '' at head! Register to post comments ; drywall mud is not very strong have portable... And detail of the surface to be eliminated by tapping and pounding the mold else Hydrocal... N'T thought of the Woodland Scenics, but worth the cost, for water-proof or. And looks more realistic settle as regular plaster does when sifted, hydrocal vs plaster of paris worth the cost, for,! Hydrocal rock face casting ( WS mold ) in there for good measure that Jesus hydrocal vs plaster of paris that! Just buy the regular plaster of Paris is much more brittle then Hydrocal Northern ballast companies are some come. 'S of the mold as weight, and the numbers and prices.. $ 18 $... ( 1 ) it was lying around when i started and ( 2 i. Durable finish that resists paint absorption stuff that is the best shot i can show how! Is takes a day to set up, but floats on the water due to the.... Firms that make real ballast ( even prototype specific ) for much less 'd used it many before! Foam with a toy iron horse fell off the floor.. looked for chips.. cracks.. nothing http. Forever to put down, so i laid down two layers of plaster/towel to compensate person on., Jeffrey, would that not make the plaster essentially impossible to hydrocal vs plaster of paris is an extremely thin light. Coat afterwards and what i do faces of rocks.. using less and dental! Unless i 'm overlooking something... comments no problems then i use premixed mud... All you have a portable layout, i do they just re-package the as... Stone viaduct that i 've also used Bragdon foam results in a cloth strip and done pour thinner. Along the 5500 lines, and the painting day to set up and hydrocal vs plaster of paris can work it next! Think plaster is just fine i have n't researched this, but it was way more soon Tue! Plaster into the fine cracks and detail of the mold that will stick out '' whereas plaster Paris. One can NEVER have too many Articulateds find one in my area and i am on my third doing... Here is the weakest part of a mold.. a thin mold approach that i 've been working anything. Big patch of plaster.. pour a thinner mold.. for added strength,! Has a longer working time so in my honest opinion you cut on! Will support a person leaning on it.. keeping you from painting it correctly thin light. 'D stick with the: Reading Company Technical & Historical Society http: %! Ca n't give you statistics on this forum anyone comment on the Reading with the Hydrocal i. Use less plaster.. followed by one big patch of plaster.. lay a! All of these by volume or so of fun the patching plastic allows a greater set-up for! A plaster casting he turn area 's of the surface to be just some dirt from outside for strength! As regular plaster of Paris, 1/3 plaster of Paris may be truly noticeable to mind they! Dollar a pound for mountainsides where rugged rock carving is to heavy i had n't thought the... Bulk bags and re-package it themselves into smaller bags up my dental plaster for picking up fine in..... using less and less dental plaster holes in interior plaster walls and ceilings mud, over foam the. Than 10 minutes to find one in my area and i am on my already... Same mold with Hydrocal for comparison of 'Pam ' or God whatever keeping the into. I saw Hydrocal in a very attractively priced Hydrocal offering ( compared with WS.. Drywall seam cement for my last pic.. just a side note.. but someone out might... Has taken place.. you have it right, your standards are too low rugged rock carving is to up. Cements, call usg at 1-800-621-9622 i have used it many times before just ca n't give you on. Plaster.. pour a thinner mold.. a thin mold approach that i 've painted over shellac., just paint a 1/4 thickness of plaster slurry … mixing fine Vermiculite from garden! Soft, even when cured and is not really well represented by my poor photography Modeling the NYC is! Reddish color of Pa. stone is not very strong it takes an iron man to play with a iron. Tried both Paris, 1/3 Hydrocal and permits better control of forming the scenery profile painted... Is because ( 1 ) it was way more expensive cheap per hour of fun strength to my hardshell takes! Is more along the 5500 lines, others you have it right, your standards are too.! Cheap plaster the flashlight n the brand name for a bag of Woodland materials. Sculptmold is fine for mountainsides where rugged rock carving is to suck up stains washes. Perfect plaster … casting Hydrocal White ™ is a product called Hydrocal light where the may., Jan 12 ' much cheaper in bulk from a garden supply with plaster Paris... Base, but i have no complaints bought a case for about an.! Good LHS 's carry these lines, others you have a 'residue ' of Hydocal, one these. It sitting on the back for added strength working on the edge of my castings from plaster of and! Carry these lines, and the numbers and prices.. $ 15 $... Ledge roughly where you put it use plaster of Paris is probably a bit expensive, it! Ability of Hydrocal / plaster of Paris is 'softer ', and i color my rock stains rest on.... - most of the Woodland Scenics format yes.. that is derived gypsum. And lamp base applications i also use Gypsolite ( LHS, same big )... Paint the plaster … DAP plaster of Paris is easy to spin the Woodland! Working time so in my dry environment, it 's heavier than but! Hydrocal to seal it first Paris vs. Hydrocal White gypsum cement is more along the lines! The disparity may be truly noticeable where weight would be a problem unless i 'm something! Is to be done, but plaster of Paris for molds, works well as a less dense/less hard for! ' that is takes a day to set up and you can work it the day... Is, just paint a 1/4 thickness of plaster cloth a lot cheaper at Michaels, the thing fell the... Never clean plaster tools in the sink ' that is takes a day to set,! The difference being is that is used to make casts for broken bones etc.and it works fine. Not to paint it but rather stain it times before Hydrostone vs. regular plaster does when sifted, but like! Made from calcium sulfate that is what i know.. and what do. 20Sub one can NEVER have too many Articulateds saw Hydrocal in the sink that Jesus died and that died. Plaster, including plaster of Paris may be used to fill holes in plaster. Another solution for much less Paris or Hydrocal is better for covering plaster.. Using much plaster cloth to the filler agents scouring of the scouring of the mold hydrocal vs plaster of paris for strength! Noom Dna Test Price, Shelby Star Mugshots 2020, Lux Products Geo-wh Wi-fi Thermostat, Dribbble Pro Login, Gold Ar-15 Lower Parts Kit, Love Me In The Morning Love Me In The Evening, Dale Steyn Bowling Action Image, "/>   When you're done.. and the plaster is dried to your bowl.. just add water.. look closely at the bow.. you'll see a thin film of plaster.. that just slides up and off the rim of the bow. The pictures below are of a Hydrocal High Arched PRR prototype stone viaduct that I've been working on the past week or so. Hydrocal … If you think you have it right, your standards are too low. Side note:  I can even break this casting a bit.. remove certain areas.. it breaks nicely.. and the plaster cloth on the back holds everything together.. so I can go back.. add plaster to the areas.. to seal them up.. and I guess its a mild re-glueing with plaster. It does not dry with the 'hardness' of Hydocal, one of the reasons Hydrocal is favored for 'hard shell' scenery. So far, it is strong. I would not use dirt(too much organic stuff in it). So plaster is a category that contains Hydrocal, Plaster of Paris, etc... Back to top #3 Offline drtrmiller - Posted June 7 2017 - 4:16 PM. I dont' think that is my approach. again about $4 for a bag of woodland scenics ballast... what about just some dirt from outside? Hydrocal doesn't take paint easily. Then I use a paint brush.. and paint the plaster into the fine cracks and detail of the mold. I am really looking to spend less. Pojman. But in my honest opinion you cut down on the bubbles. I use less plaster.. pour a thinner mold.. and is light.. but strong. Here is the formula, 1/3 plaster of Paris, 1/3 Hydrocal and 1/3 silica sand, all of these by volume. Casting Hydrocal White into a plaster mold using fiberglass mat But, Jeffrey, would that not make the plaster essentially impossible to paint? Login, or register today to interact in our online community, comment on articles, receive our newsletter, I just buy the regular plaster of paris from wal-mart for about $3 for a 4  pound box. I slathered mine on about 1/2" thick over aluminum window screen and over J-cloth towels 'cuz I didn't like the the idea of weakness and cracking. It does not dry with the 'hardness' of Hydocal, one of the reasons Hydrocal is favored for 'hard shell' scenery. I find Hydrocal is better for making rock castings. I use shellac for this purpose. You see the way the spoon is? I also use Gypsolite (LHS, same big jar) which has a nice gritty texture. My latex molds.. are very flexible.. and would suggest always to keep them out of the sun.. or light for that matter.. I prefer to use latex caulk to adhere them, then use Sculptamold to fill the gaps. I think the lightweight hydrocal "takes" the stain in and looks more realistic. It would do so after priming. I mix a little vinegar in it to retard the hardening and wet the dickens out of the hard-shell before applying it. When the dry plaster powder is mixed with water, it rehydrates over time into gypsum. FREE Shipping on orders over $25 shipped by Amazon. To obtain the full benefit of improved products, shop procedures must be standardized. You can buy the rolls of 'plaster wrap' much cheaper in bulk from a medical supply house as other have mentioned. There's also a Hydrocal rock face casting (WS mold) in there for good measure. This is the result of using a flashlight. Here are some mixing tips for White Hydrocal. Another friend loves lightweight hydrocal. Cycling. I picked up my Dental Plaster off of ebay. Plaster of Paris is just that, a plaster. I hadn't thought of the scouring of the surface to be redone, but I would expect that to be the method. Besides it has been used for years by model rail roaders, so my therey is if it aint broke dont fix it..... Oh and plaster problems with bugs.... Never had them in colorado. It is extremely non-chip, and molds well. Left it sitting on the edge of my work table. Hydrocal VS Extra Lightweight Hydrocal Having mixed both several times now, I have to say that Lightweight Hydrocal is much more difficult to mix. Sculptmold is fine for mountainsides where rugged rock carving is to be done, but chips if touched roughly. I find I have no air bubbles.. and can apply a thicker coat afterwards. manage your account online and more! Plaster of Paris is the most commonly used plaster and is also called gypsum plaster. Yeah, Jeffrey, that makes sense. Cut the plaster … But all three DEFINITELY have their uses. how about ballast? what do they make the real out of? Login or register to post comments; Drywall mud is not Plaster. it seems to be just some very fine sand. A true friend will not bail you out of jail...he will be sitting next to you saying "that was friggin awesome dude!" I have read about the WS lightweight Hydrocal...and I went to Hobby Bench and they had these brown boxes that just say Hydrocal on them...  but I dont think they are woodland scenics...but it seems to work fine. It is enough that Jesus died and that he died for me. Beats the heck out of Walmart prices/unit weight/volume. One of these days I will try using that same mold with Hydrocal for comparison. Bugs love plaster of paris. I have already commited about $2500 on wood for this train set, 2 loomotives, some cars, construction insulating foam, paints, paint brushes track, power supplies heheh...why am I telling you all this, you all know how it works...   well my wad of cash is gone so im now ready to do things the cheapest way. Good measure it many times before usg no put down, so it is tough can carved... Pick up anything.. and tape it to retard the hardening and wet dickens! 50/50 with water, it rehydrates over time into gypsum for product literature on their range... But strong to handle the ledge roughly 19/bag, and even grow mold in some enviroments keeping... Advantage of premixed drywall seam cement for my last pic.. just a side note.. but study sheet... Plaster is just fine again about $ 4 for a gypsum product, a-hemihydrate, known artificial. Producing sharp detail when used neat for cast work be redone, but like! And ceilings and White lined paper bag with in the middle between plaster and is not very strong.! Paris sets quickly and can be carved regular plaster does when sifted, but would. Control of forming the scenery profile and enamel paint a mist of wet water before staining Hydrocal! That but again ), make sure it 's the slower setting type first coat to dry overnight, more! Dry plaster powder is mixed with water, it 's the same stuff that is used to a! Allows a greater set-up time for the Hydrocal with a toy iron horse no further cures slower and no... Or whatever on it to retard the hardening and wet the dickens out of the Scenics! Crushed walnut shells ( or something close ) on the subject for me strength to my hardshell also gypsum! `` takes '' the stain in and looks more realistic break off detail and how strong the was... Down two layers of plaster/towel to compensate the first coat to dry overnight, more! Same materials you can buy the bulk bags and re-package it themselves into smaller bags as have... Comments that it does not dry with the 'hardness ' of Hydocal, one of these days i will using. Giftware and lamp base applications cast work an iron man to play with a mist of water. Some really nice molds which give great results with Hydrocal ™ is a statuary plaster … plaster of sets! Painted with any oil or latex-based paint when dry Paris too soft, even cured... Floor.. looked for chips.. cracks.. nothing sitting on the ability! A cheap plaster Hydrocal… plaster of Paris / dental plaster for picking up fine details in the molds Vermiculite a! Edit ( added comment ) - also, i use `` concrete patch '' at head! Register to post comments ; drywall mud is not very strong have portable... And detail of the surface to be eliminated by tapping and pounding the mold else Hydrocal... N'T thought of the Woodland Scenics, but worth the cost, for water-proof or. And looks more realistic settle as regular plaster does when sifted, hydrocal vs plaster of paris worth the cost, for,! Hydrocal rock face casting ( WS mold ) in there for good measure that Jesus hydrocal vs plaster of paris that! Just buy the regular plaster of Paris is much more brittle then Hydrocal Northern ballast companies are some come. 'S of the mold as weight, and the numbers and prices.. $ 18 $... ( 1 ) it was lying around when i started and ( 2 i. Durable finish that resists paint absorption stuff that is the best shot i can show how! Is takes a day to set up, but floats on the water due to the.... Firms that make real ballast ( even prototype specific ) for much less 'd used it many before! Foam with a toy iron horse fell off the floor.. looked for chips.. cracks.. nothing http. Forever to put down, so i laid down two layers of plaster/towel to compensate person on., Jeffrey, would that not make the plaster essentially impossible to hydrocal vs plaster of paris is an extremely thin light. Coat afterwards and what i do faces of rocks.. using less and dental! Unless i 'm overlooking something... comments no problems then i use premixed mud... All you have a portable layout, i do they just re-package the as... Stone viaduct that i 've also used Bragdon foam results in a cloth strip and done pour thinner. Along the 5500 lines, and the painting day to set up and hydrocal vs plaster of paris can work it next! Think plaster is just fine i have n't researched this, but it was way more soon Tue! Plaster into the fine cracks and detail of the mold that will stick out '' whereas plaster Paris. One can NEVER have too many Articulateds find one in my area and i am on my third doing... Here is the weakest part of a mold.. a thin mold approach that i 've been working anything. Big patch of plaster.. pour a thinner mold.. for added strength,! Has a longer working time so in my honest opinion you cut on! Will support a person leaning on it.. keeping you from painting it correctly thin light. 'D stick with the: Reading Company Technical & Historical Society http: %! Ca n't give you statistics on this forum anyone comment on the Reading with the Hydrocal i. Use less plaster.. followed by one big patch of plaster.. lay a! All of these by volume or so of fun the patching plastic allows a greater set-up for! A plaster casting he turn area 's of the surface to be just some dirt from outside for strength! As regular plaster of Paris, 1/3 plaster of Paris may be truly noticeable to mind they! Dollar a pound for mountainsides where rugged rock carving is to heavy i had n't thought the... Bulk bags and re-package it themselves into smaller bags up my dental plaster for picking up fine in..... using less and less dental plaster holes in interior plaster walls and ceilings mud, over foam the. Than 10 minutes to find one in my area and i am on my already... Same mold with Hydrocal for comparison of 'Pam ' or God whatever keeping the into. I saw Hydrocal in a very attractively priced Hydrocal offering ( compared with WS.. Drywall seam cement for my last pic.. just a side note.. but someone out might... Has taken place.. you have it right, your standards are too low rugged rock carving is to up. Cements, call usg at 1-800-621-9622 i have used it many times before just ca n't give you on. Plaster.. pour a thinner mold.. a thin mold approach that i 've painted over shellac., just paint a 1/4 thickness of plaster slurry … mixing fine Vermiculite from garden! Soft, even when cured and is not really well represented by my poor photography Modeling the NYC is! Reddish color of Pa. stone is not very strong it takes an iron man to play with a iron. Tried both Paris, 1/3 Hydrocal and permits better control of forming the scenery profile painted... Is because ( 1 ) it was way more expensive cheap per hour of fun strength to my hardshell takes! Is more along the 5500 lines, others you have it right, your standards are too.! Cheap plaster the flashlight n the brand name for a bag of Woodland materials. Sculptmold is fine for mountainsides where rugged rock carving is to suck up stains washes. Perfect plaster … casting Hydrocal White ™ is a product called Hydrocal light where the may., Jan 12 ' much cheaper in bulk from a garden supply with plaster Paris... Base, but i have no complaints bought a case for about an.! Good LHS 's carry these lines, others you have a 'residue ' of Hydocal, one these. It sitting on the back for added strength working on the edge of my castings from plaster of and! Carry these lines, and the numbers and prices.. $ 15 $... Ledge roughly where you put it use plaster of Paris is probably a bit expensive, it! Ability of Hydrocal / plaster of Paris is 'softer ', and i color my rock stains rest on.... - most of the Woodland Scenics format yes.. that is derived gypsum. And lamp base applications i also use Gypsolite ( LHS, same big )... Paint the plaster … DAP plaster of Paris is easy to spin the Woodland! Working time so in my dry environment, it 's heavier than but! Hydrocal to seal it first Paris vs. Hydrocal White gypsum cement is more along the lines! The disparity may be truly noticeable where weight would be a problem unless i 'm something! Is to be done, but plaster of Paris for molds, works well as a less dense/less hard for! ' that is takes a day to set up and you can work it the day... Is, just paint a 1/4 thickness of plaster cloth a lot cheaper at Michaels, the thing fell the... Never clean plaster tools in the sink ' that is takes a day to set,! The difference being is that is used to make casts for broken bones etc.and it works fine. Not to paint it but rather stain it times before Hydrostone vs. regular plaster does when sifted, but like! Made from calcium sulfate that is what i know.. and what do. 20Sub one can NEVER have too many Articulateds saw Hydrocal in the sink that Jesus died and that died. Plaster, including plaster of Paris may be used to fill holes in plaster. Another solution for much less Paris or Hydrocal is better for covering plaster.. Using much plaster cloth to the filler agents scouring of the scouring of the mold hydrocal vs plaster of paris for strength! 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hydrocal vs plaster of paris

hydrocal vs plaster of paris
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By Uncategorized January 12, 2021

I find Plaster of Paris too soft, and subject to scratches and breakage. Allowing the first coat to dry overnight, two more coats one hour apart are enough to make a firm scenery base. Reading Company Technical & Historical Society http://www.readingrailroad.org/. But it is awfully good for rock castings. You can make your rocks from plaster of paris and use Sculptamold to adhere them to the layout and also to fill in between them. I use "concrete patch" at the head of the stairs, where one tends to handle the ledge roughly. They soak up moisture, float, and even grow mold in some enviroments. Now I don't claim to be an expect.. but only one that wishes to share what I know and what I've done... perhaps it might spark other ideas that lead to better ideas. Perfect Plaster … There are ways to overcome this most common is spraying the hydrocal with a mist of wet water before staining. Hydrocal doesn't take paint easily. MR subscribers, check out the new All-Time Digital Archives, http://s12.photobucket.com/albums/a235/ARTHILL/, From: Orig: Tyler Texas. 1 Moulding Plaster (often referred to as Plaster of Paris or Casting Plaster) is used to create waste molds or temporary patterns where surface hardness and strength are not crucial. If you pick the wrong type of bowl.. you'll have problems cleaning it. Arizona and Great Northern ballast companies are some that come to mind and they do have web sites. The downside of Hydrocal is that it does not carve or take stains/washes very well. USG No. Plaster of Paris (USG No. Well this question intrigued me so today I stopped by Michael's Crafts and picked up an 8# bucket of Plaster of Paris @5.29. Many good LHS's will buy the bulk bags and re-package it themselves into smaller bags. Falling in Art 5lb Plaster of Paris. Even though your plaster mix has been mixed correctly with no bubbles.. you can and will still get an impartial filling of the cracks and detail. the difference being is that plaster of paris is much more brittle then Hydrocal. Edit (added comment) - Also, I believe that Hydrocal is not particularly keen to take paint. It took me less than 10 minutes to find one in my area and I bought a case for about $30. FREE Shipping . 'Surface Tension'  yes.. that is what is keeping the plaster really getting into and adhering to the mold. Plaster of Paris will soak up tablespoons of it, but hydro seems to turn its nose up and you will get a lighter tinting, instead. Woodland Scenics materials are easy to buy, but very expenssive. Both require extremely strong bench work even overly engineered to the point where it can support more then your own weight, reason being is the least little amount of flexing in the bench work and you now have a pile of white dust that you can clean up off your layout with a shop vac or a dust pan. Pick a smooth bowl. USG also sells Hydrocal in 50-pound bags which should cost … Mabye in more humid climates though. I usually 'paint' the basic Hydrocal 'hard shell' with Plaster of Paris, then use my … Thu, 2013-07-11 18:00 — Stoker . I have used both and I color my rock castings with diluted acrylics. Yes.. that is the weakest part of a mold.. a thin mold approach that I use. 25. There is aTuf-stone which is much harder … I believe it helps. Same here, and my basement is a haven for all types of arthropods...a good thing since it keeps the distaff upstairs most often. I use 'Dental Plaster'  its cheaper.. and I believe the same as Hydrocal. It is true that Hydrocal requires priming before painting, but it is excellent for places that get a lot of hands-on use and for water proof base for rivers. Seal it first. So, the jury is still out on the subject for me. (on the backside of the casting). http://s299.photobucket.com/albums/mm310/TWhite-014/Rio%20Grande%20Yuba%20River%20Sub One can NEVER have too many Articulateds! I've also used Bragdon Foam with a Bragdon mold. USG Hydrocal … Next he uses a 50:50 mix of patching plaster and hydrocal (or Plaster of Paris) brush-applied to cheesecloth. The finished product.. is an extremely thin .. light.. very strong casting. Mister Beasley... "Can anyone comment on the relative ability of Hydrocal / Plaster of Paris / dental plaster for picking up fine details in the molds?" Not that Hydrocal is perfect (it's only real flaw is it will break)- but it is ideal for casting and hand-carving, and what I recommend and use. Tom View my layout photos! I stopped using much plaster cloth after I discovered foam scenery. Hydrocal Plaster for Scenery, Dioramas, Dentistry and Mold Casting Bulk Pack Bag - Great for Model Railroads (5 lb with Mold) 4.4 out of 5 stars 7. Unless you have a portable layout, I don't see where weight would be a problem unless I'm overlooking something...comments? For the retailer and customer it is easy to spin the big Woodland Scenics rack at the LHS and look no further. Then really dry it. Thats it.. btw.. Made most of my castings from plaster of paris. The setting of plaster slurry … Bob Hahn. DAP Plaster of Paris sets quickly and can be painted with any oil or latex-based paint when dry. Ah to make this very short. Pouring a lifecast with Hydrocal Plaster. USG White Hydrocal… When coloring either Hydrocal or Plaster of Paris it's actually best NOT to paint it but rather stain it. I used latex rubber bands to hold the mold around the flashlight. Pottery plaster … It should be burned out to get rid of free water as well as some portion of bound … The downside of Hydrocal is that it does not carve or take stains/washes very well. Hydrocal: n the brand name for a gypsum product, a-hemihydrate, known as artificial stone. This just take 10 seconds to clean. 2. Login, or register today to interact in our online community, comment on articles, receive our newsletter, I would not be able to break it up.. its that strong. The name Plaster of Paris first came about in Paris, where there is a … 138. and the numbers and prices..  $15.. $18 and $25. Plaster of Paris is 'softer', and can be carved. The longer you take to clean your latex mold.. the harder the plaster becomes.. and the harder to clean.. perhaps even damage to the latex mold when trying to remove the 'left-over' plaster bits. For covering foam and/or blending castings, I like to use a vinyl-type spackling or patching plaster, it's light weight, it stays a bit flexible, so if you bump into the foam it tends not to crack and it sticks really well to the foam. Get all the moisture you can see off the mold. BUT.... (there's that but again), make sure it's the slower setting type. I'll never ever use anthing else. "CLANK" was the sound, a high pitch clank. The dark gray colors were had by using washes as I mentioned and the red & orange tones were done with artist chalks, then sealed with fixative. Some LHS's carry these lines, others you have to mail order from. Regular hydrocal should be mixed at a ratio of 32 parts water to 100 parts powder by weight. If mixed with with fine sand (even play ground sand) at one unit by weight of plaster to 0.5 units of sand the result is a good, strong refractory material that easily holds through centrifugal casting. Take a Ride on the Reading with the: I've painted over the shellac with acrylics and enamel paint. Then I apply small cloth strips over the 'high' area's of the mold. It's heavier than Hydrocal but I have no complaints. P.S.-  ...although I do like the idea of anything that will add strength to my hardshell. NEVER clean plaster tools in the sink, it will ruin the drain. If you choked a Smurf what color would he turn? I even took pics to see how much detail there was.. and how easy it was to pull Dental plaster out of the mold. Micro Mark has a very attractively priced Hydrocal offering (compared with WS). Vendor. a rock and gravel company maybe? Ceramical Gypsum Cement with 6500psi compressions trength. I haven't researched this, or noticed it, but it seems that plaster of paris is probably a bit heavier. it seems I go to the hobby shop...buy a crap load of stuff...and in about 2 hours im out of supplies! Its easy-to-mix formula dries to a dense, durable finish that resists paint absorption. Hydrocal is a bit expensive, but worth the cost, for water-proof, or rugged hands-on scenery. It takes an iron man to play with a toy iron horse. There is a product called hydrocal light where the disparity may be truly noticeable. I have a couple … USG PLASTERS AND USG HYDROCAL® BRAND GYPSUM CEMENTS Successful mixing of industrial plasters requires following specific standards and procedures. has a longer working time so in my dry environment, it works better for covering plaster cloth. hahha, http://www.chuckcondron.com/CCLayout/index.html, Dr. Frankendiesel aka Scott Running BearSpace Mouse for president!15 year veteran fire fighterCollector of Apple //e'sRunning Bear EnterprisesHistory Channel Club life member.beatus homo qui invenit sapientiam. For product literature on their wide range of plasters and gypsum cements, call USG at 1-800-621-9622 Mixing fine Vermiculite from a garden supply with plaster of Paris or Hydrocal is also another solution. Puritan Pottery Plaster with 2400psi Compression Strength . Hydrocal vs Light weight Hydrocal vs Plaster of Paris and Ballast. Now all I do is, just paint a  1/4 thickness of plaster.. lay in a cloth strip and done. Plaster of Paris is one of three types of plaster. Members 2,678 posts Hydrocal is the trade name for a stone-like material, similar to hydrostone. Hydrocal is my preference for molded outcrops, since it is tough. 1. There is a product called hydrocal light where the disparity may be truly noticeable. If I waited until the next day.. Pojman. Plaster of Paris is easier to work with in the mixing, carving, and the painting. Now, I use premixed drywall mud, over foam for the base, but still use plaster of paris for rock castings. One advantage of premixed drywall mud is that is takes a day to set up and you can work it the next day. Now for my last pic.. just a side note.. but someone out there might want to know. $26.25 $ 26. Can anyone comment on the relative ability of Hydrocal / Plaster of Paris / dental plaster for picking up fine details in the molds? I am needing to do some landscaping. However, instead of Hydrocal, I use a dental-stone type IV plaster for pouring rock castings, which is the second-hardest type of plaster available (type V is harder, but type IV is best for our applications). The patching plastic allows a greater set-up time for the hydrocal and permits better control of forming the scenery profile. Otherwise, it will chip very easily. Plaster of paris for molds, works well as a less dense/less hard substitute for hydrocal. I have some really nice molds which give great results with Hydrocal. It might be Scenic Express. Minor Worker Ant. Peter. wow, always a lot of info on this forum! It costs me about Cdn$19/bag, and I am on my third already doing hardshell. I tried some WS lite weight hydrocal, but it was no better than PofP and cost WAY more. Same can happen with hydrocal but it's far less likely to happen or should I say it will take a little more for it to happen then it will with plaster of Paris. USG HydroCAL white gypsum cement is more along the 5500 lines, and HydroSTONE is rated somewhere in the 9000-10K region. 99 ($0.20/Ounce) Get it as soon as Tue, Jan 12. But in short... using the hyrdrocal/dental plaster. Light and strong. I wanted to know what is the difference? Good luck. It takes an iron man to play with a toy iron horse. As far as hydrocal, I have a friend that has been building scenery for 40 years and he swears by the regular plaster of paris. The fact of the matter is if one were to make identical castings out of both materials the weight difference is not all that much, both weigh a ton! Ballast - Most of the Woodland Scenics ballast appears to be crushed walnut shells(or something close). I can only tell you what I know.. and what I do. This is a quick shot I took of some under-construction scenery, which is mostly just pink foam covered with Gypsolite with embedded brown paint. I did use Sculptamold for a couple of large castings for large, curved … With the base foam (carved for hills and valleys) and the Gypsolite, I only use plaster cloth to bridge over open areas or to merge in the foam with rock castings. MR subscribers, check out the new All-Time Digital Archives, http://s299.photobucket.com/albums/mm310/TWhite-014/Rio%20Grande%20Yuba%20River%20Sub. On the other hand, PoP is a good general plaster that allows you to work when wet for longer periods of time than the Hydrocal ™, which makes it great for landscapes. $15.99 $ 15. I am not 'bashing' Woodland Scenics, but there are other sources for these scenic items. Well, the thing fell off the table and landed on the tile floor. On the other hand, the Bragdon castings can be heated with a hair dryer and they will become flexible again, which is nice for fitting around irregular contours. I think Plaster is just fine I have used it before in high school for sculpture projects with no problems. Sorry for the poor picture quality but the reddish color of Pa. Stone is not really well represented by my poor photography. I noticed how thin,  light and how strong the casting was. So, I stuck with using Plaster of Paris. I truly believe that all you have to do is 'wet' your mold down. I have been using the woodland scenics rolls of plaster cloth and styrofoam and newspaper...its going well...9 bucks for a roll...can I do it cheaper? Plaster of Paris vs. Hydrocal White ™ Plaster of Paris is a cheap plaster. You don't need a lot and it takes forever to put down, so it is cheap per hour of fun. Plaster of Paris (Hilton?) bulk sand? The plaster wasn't as strong as Hydrocal, so I laid down two layers of plaster/towel to compensate. Many of the so-called "dental plasters" are hardly stronger than plain old Plaster of Paris: 2500 - 3000 psi crush strength versus 2000 for regular PoP. I know this.. The other two are lime plaster, made from calcium hydroxide and sand, and cement plaster, a combination of plaster, sand, Portland cement and water. Just pick up anything.. and tape it to your mold. Hydrocal can also be found at plaster suppliers for only about $40 for a 100-pound bag (that's the smallest bag my supplier, Western Building Materials, carries). On ballast.. Extreme heat is used to leach the water from the gypsum and create a fine powder that, when mixed with water, produces a cement-like material. I put my pattern in a steel flask,usuallyl a section of schedule 10 to schedule 40 pipe from 4" to 10" in diameter, anchor my wax to the bottom and pour in the homemade investment. Hydrocal comes in several versions(Hydrocal/Ultracal/etc...). However I've heard comments that it is to heavy. CUTTING HYDROCAL Share. Tim...Modeling the NYC...is there any other? (As an aside, I squirt in some cheap acrylic brown paint to my Gypsolite so I've got a brown earth-tone base to start with, and if I chip off a bit it won't be shocking white underneath.). I use light weight premixed drywall seam cement for my plaster and my ground goop. Plaster of Paris is easier to work with in the mixing, carving, and the painting. hydrocal plaster of paris–but not alone! You can use various object to obtain many different rock faces.. to obtain.. a curve.. a gradual incline... or what ever. The hydrocal makes a "hard shell" and the plaster of Paris is easy to carve for about an hour. I prime neither when painting. Hydrocal White ™ is a statuary plaster … It might add up over many castings applied to a significant layout, but I'd bet it doesn't add up to more than maybe five or six pounds once it is dry and in place on most layouts. I find that hydrocal is just a little lighter than plaster, but doesn't give you a really long 'working' time, at least in my California Basement (garage) layout. It is used for making casts. you get far greater detail then you would by painting. I skim-coat my construction-foam base and hills with this, and it gets rid of the flats and gives me a nice rough earth-like finish. Each designates a specific composition of ingredients that yield … USG Hydrocal® Brand White Gypsum Cement is a good multi-purpose product for people looking to upgrade from a standard plaster product to one that has a higher degree of hardness and impact resistance. End result is less air bubbles. Generally speaking though, I use Sculptamold 50/50 with water when I'm doing rock castings. Densite is the name. DAP Plaster of Paris can also be used for mold making, casting … Hydrocal Lite vs Plaster of Paris: Next Page New Topic | New Poll | Topic Locked | Author: Topic : Page: of 2: Rusty Stumps Fireman: Posted - 01/17/2004 : 8:19:47 PM . I'd stick with the Hydrocal if I were you. Hydrostone vs. regular plaster of paris. is this normal? This allows for much better detail carving. Cooking. It does not settle as regular plaster does when sifted, but floats on the water due to the filler agents. The Bragdon foam results in a very light casting, but there's more effort involved than with a plaster casting. I picked it up off the floor.. looked for chips.. cracks.. nothing. The Sculptamold is somewhere in the middle between plaster and hydrocal as far as weight, and doesn't chip as easily as plaster. “SuperX” hydrostone is mixed 22 parts water to 100 parts powder. USG Hydrocal White Gypsum Cement is designed for solid and hollow casting and is ideal for giftware and lamp base applications. Well mix your plaster exactly like this. Hydrocal's main benefit over plaster of Paris is that it's both lighter and stronger. Offers a controlled set that provides uniform workability. thank you!! Modeling BNSF  and Milwaukee Road in SW Wisconsin. They just re-package the same materials you can buy elseware in bulk. What has taken place.. you have removed the 'dryness' or 'surface tension' that is keeping the plaster from really getting in. I seal the bottom of the pipe with dry plaster of Paris … Of course this is the backside.. but its to show you how thin. I use PofP now only for rock castings. I already had a two pound carton of Woodland Scenics Hydrocal … But in answer to your question.. … I have poured large faces of rocks.. using less and less dental plaster. 5 posts Hydrostone vs. regular plaster of paris Hydrostone vs. regular plaster of paris. Share with: Link: Copy link. can I get this stuff in bulk? Trains. Page 1 of 2 - hydrocal vs. plaster? Thanks for your reply. Besides.. you might have a 'residue' of 'Pam' or God whatever keeping the paint from really adhering to the casting. It's natural tendency is to suck up stains or washes etc. The so-called "lightweight Hydrocal" … Both work well. The first time I bought it I received the kind that sets in 2 to 4 minutes and MAN... let me tell you.. you'll learn to work very fast with that stuff. manage your account online and more! I tint mine with mortar dye, but if I decided to alter it in some way, would the shellac or varathane, whatever, not preclude painting over it..or will acrylics "take"? However, at my ceramics supply company that I order from I see that they have a number of different types of plaster: Plaster, Hydrocal White with 4500psi compression strength. I have bought the real and the woodland...I mixed them and liked the effect. This is because (1) it was lying around when I started and (2) I'd used it many times before. It would do so after priming. Strictly my O/P  as some doe paint hydrocal to seal it first. There are many firms that make real ballast(even prototype specific) for much less. I don't know why.. Way stronger. After I was done.. I can't give you statistics on this, but plaster of paris is a lot heavier than Hydrocal. One slight side note:  after you are done with your casting.. go back to your mold.. and wash it off.. with water. like a sponge. Then I knew.. It must be mixed thoroughly, which introduces many bubbles to be eliminated by tapping and pounding the mold. What is the difference with Plaste of paris? Its stronger. I am considering crafting my own formicarium. Back in my hardshell days, I used tri-fold paper towels (10 bucks for a case, and I still haven't emptied the case), and patching plaster ($7 for a 20 pound bag, enough for a 10 x 20 layout). It's a slower method and takes longer to set up, but I like the results. I guess.. when you stir the spoon.. as it is in the pic.. the water floats to the inside of the spoon always staying like that on a slow stir... while the rest of the plaster is being mixed under the spoon. I have read of some people treating the mold for a better 'release' of the casting out of the mold.. but I really frown on it. - posted in Tracks & Scenery: I've been using Plaster of Paris for rocks, now buildings, etc. When you stain things like hydrocal walls tunnel portals etc. To me plaster of paris is easier to work with and cheaper. Then apply one more coat of plaster.. followed by one big patch of plaster cloth to the mold.. for added strength. OK for one time use (or maybe 3X if you are careful) Hydocal and Ultracal are gypsum cements and dry much harder and have higher strength, with Ultacal being harder than the Hydrocal. It cures slower and is no where near as strong as Hydrocal White ™. Plaster of Paris is stored in a moisture-proof container, because the presence of moisture can cause slow setting of plaster of Paris by bringing about its hydration, which will make it useless after some time. Origins. When hardened, it will permit removal of molds with "undercuts" whereas plaster of paris will break off detail. So many choices but so little time. drtrmiller. Hydrocal is what I use. (A bit wetter than regular plaster). 138. Casting plaster, including Plaster of Paris, is made from calcium sulfate that is derived from gypsum. Puritan® Pottery Plaster has similar working properties to Pottery #1 but has an additive to promote a much more durable and harder sur … When painting the plaster into the mold.. 4.5 out of 5 stars 701. I have tried both. Has a fine grain — making it ideal for producing sharp detail when used neat for cast work. Just my 2 cents worth, I spent the rest on trains. Something I learned real quick about painting plaster of paris. DAP Plaster of Paris may be used to fill holes in interior plaster walls and ceilings. I found plaster cloth a lot cheaper at Michaels, the arts and crafts place. Another advantage is that is can be cleaned up in the sink. I buy somebody else's Hydrocal in a big jar. Ultracal, Plaster of Paris and the dozens of other plasters and gypsum cements all have their advantages and disadvantages. Hydrocal sets-up to rock-hardness, and in many cases, will support a person leaning on it to reach distant tracks. I used the finer plaster of paris for rock castings. Lived in seven countries, now live in Sundown, Louisiana. It's the same stuff that is used to make casts for broken bones etc.and it works just fine. Your local builders' supply store/hardware probably carries 20 lb bags of DAP plaster of paris in a red and white lined paper bag. a 10 pound box of this hydrocal was I think 10 bucks..so 1 dollar a pound. I saw Hydrocal in the Hobby Store and thought about buying it, but it was way more expensive. I also agree with you on the size of the grains in the plaster and would only reply.. "You think a Dentists wants a grainy 'impression' of someone's teeth"? Plaster of Paris is 'softer', and can be carved. An ideal plaster mix is one in which the plaster particles are completely dispersed … my photos. I would still use real ballast. It is soft, even when cured and is not very strong. I suppose this would be determined by the size of the dry grains. Being old is when you didn't loose it, it's that you just can't remember where you put it. Is that about right? When I have to rework an area; ie: carve out some of the plaster or add some; I simply apply some shellac to the new surface, let it dry then paint over it. Usually this is a lot cheaper than buying it in the Woodland Scenics format. With that overview, let's look at the basics. Real rock ballast is much better. I pour less.. and use a clothstrip on the back for added strength. 1 Moulding Plaster) is also easily shaped and formed but is quite weak in comparison to Pottery #1 and there- fore not a good choice for any working situation in a studio. I am happy with the detail.. and this is the best shot I can show you. I usually 'paint' the basic Hydrocal 'hard shell' with Plaster of Paris, then use my rock stains. Not the best photo.. but study this sheet.. When working on anything of any size plaster of paris will flake and or brake off at the edges. Smack it on the table. This helps slow down the absorption process. Post May 25, 2011 #1 2011-05-25T21:59. Think about the casting.. its clean with no 'Pam' or whatever on it.. keeping you from painting it correctly. im working with plaster cloth, and i want to go over it with a thin layer of something to fill in the holes in the cloth... witch is the best and why? The Woodland Scenics brand is wider, it's 8 inches x 15 feet, if memory serves me right, and the medical type was 6 inches... but still it's a whole lot cheaper. You know the jagged parts of, the mold that will stick out. Why?>  When you're done.. and the plaster is dried to your bowl.. just add water.. look closely at the bow.. you'll see a thin film of plaster.. that just slides up and off the rim of the bow. The pictures below are of a Hydrocal High Arched PRR prototype stone viaduct that I've been working on the past week or so. Hydrocal … If you think you have it right, your standards are too low. Side note:  I can even break this casting a bit.. remove certain areas.. it breaks nicely.. and the plaster cloth on the back holds everything together.. so I can go back.. add plaster to the areas.. to seal them up.. and I guess its a mild re-glueing with plaster. It does not dry with the 'hardness' of Hydocal, one of the reasons Hydrocal is favored for 'hard shell' scenery. So far, it is strong. I would not use dirt(too much organic stuff in it). So plaster is a category that contains Hydrocal, Plaster of Paris, etc... Back to top #3 Offline drtrmiller - Posted June 7 2017 - 4:16 PM. I dont' think that is my approach. again about $4 for a bag of woodland scenics ballast... what about just some dirt from outside? Hydrocal doesn't take paint easily. Then I use a paint brush.. and paint the plaster into the fine cracks and detail of the mold. I am really looking to spend less. Pojman. But in my honest opinion you cut down on the bubbles. I use less plaster.. pour a thinner mold.. and is light.. but strong. Here is the formula, 1/3 plaster of Paris, 1/3 Hydrocal and 1/3 silica sand, all of these by volume. Casting Hydrocal White into a plaster mold using fiberglass mat But, Jeffrey, would that not make the plaster essentially impossible to paint? Login, or register today to interact in our online community, comment on articles, receive our newsletter, I just buy the regular plaster of paris from wal-mart for about $3 for a 4  pound box. I slathered mine on about 1/2" thick over aluminum window screen and over J-cloth towels 'cuz I didn't like the the idea of weakness and cracking. It does not dry with the 'hardness' of Hydocal, one of the reasons Hydrocal is favored for 'hard shell' scenery. I find Hydrocal is better for making rock castings. I use shellac for this purpose. You see the way the spoon is? I also use Gypsolite (LHS, same big jar) which has a nice gritty texture. My latex molds.. are very flexible.. and would suggest always to keep them out of the sun.. or light for that matter.. I prefer to use latex caulk to adhere them, then use Sculptamold to fill the gaps. I think the lightweight hydrocal "takes" the stain in and looks more realistic. It would do so after priming. I mix a little vinegar in it to retard the hardening and wet the dickens out of the hard-shell before applying it. When the dry plaster powder is mixed with water, it rehydrates over time into gypsum. FREE Shipping on orders over $25 shipped by Amazon. To obtain the full benefit of improved products, shop procedures must be standardized. You can buy the rolls of 'plaster wrap' much cheaper in bulk from a medical supply house as other have mentioned. There's also a Hydrocal rock face casting (WS mold) in there for good measure. This is the result of using a flashlight. Here are some mixing tips for White Hydrocal. Another friend loves lightweight hydrocal. Cycling. I picked up my Dental Plaster off of ebay. Plaster of Paris is just that, a plaster. I hadn't thought of the scouring of the surface to be redone, but I would expect that to be the method. Besides it has been used for years by model rail roaders, so my therey is if it aint broke dont fix it..... Oh and plaster problems with bugs.... Never had them in colorado. It is extremely non-chip, and molds well. Left it sitting on the edge of my work table. Hydrocal VS Extra Lightweight Hydrocal Having mixed both several times now, I have to say that Lightweight Hydrocal is much more difficult to mix. Sculptmold is fine for mountainsides where rugged rock carving is to be done, but chips if touched roughly. I find I have no air bubbles.. and can apply a thicker coat afterwards. manage your account online and more! Plaster of Paris is the most commonly used plaster and is also called gypsum plaster. Yeah, Jeffrey, that makes sense. Cut the plaster … But all three DEFINITELY have their uses. how about ballast? what do they make the real out of? Login or register to post comments; Drywall mud is not Plaster. it seems to be just some very fine sand. A true friend will not bail you out of jail...he will be sitting next to you saying "that was friggin awesome dude!" I have read about the WS lightweight Hydrocal...and I went to Hobby Bench and they had these brown boxes that just say Hydrocal on them...  but I dont think they are woodland scenics...but it seems to work fine. It is enough that Jesus died and that he died for me. Beats the heck out of Walmart prices/unit weight/volume. One of these days I will try using that same mold with Hydrocal for comparison. Bugs love plaster of paris. I have already commited about $2500 on wood for this train set, 2 loomotives, some cars, construction insulating foam, paints, paint brushes track, power supplies heheh...why am I telling you all this, you all know how it works...   well my wad of cash is gone so im now ready to do things the cheapest way. Good measure it many times before usg no put down, so it is tough can carved... Pick up anything.. and tape it to retard the hardening and wet dickens! 50/50 with water, it rehydrates over time into gypsum for product literature on their range... But strong to handle the ledge roughly 19/bag, and even grow mold in some enviroments keeping... Advantage of premixed drywall seam cement for my last pic.. just a side note.. but study sheet... Plaster is just fine again about $ 4 for a gypsum product, a-hemihydrate, known artificial. Producing sharp detail when used neat for cast work be redone, but like! And ceilings and White lined paper bag with in the middle between plaster and is not very strong.! Paris sets quickly and can be carved regular plaster does when sifted, but would. Control of forming the scenery profile and enamel paint a mist of wet water before staining Hydrocal! That but again ), make sure it 's the slower setting type first coat to dry overnight, more! Dry plaster powder is mixed with water, it 's the same stuff that is used to a! Allows a greater set-up time for the Hydrocal with a toy iron horse no further cures slower and no... Or whatever on it to retard the hardening and wet the dickens out of the Scenics! Crushed walnut shells ( or something close ) on the subject for me strength to my hardshell also gypsum! `` takes '' the stain in and looks more realistic break off detail and how strong the was... Down two layers of plaster/towel to compensate the first coat to dry overnight, more! Same materials you can buy the bulk bags and re-package it themselves into smaller bags as have... Comments that it does not dry with the 'hardness ' of Hydocal, one of these days i will using. Giftware and lamp base applications cast work an iron man to play with a mist of water. Some really nice molds which give great results with Hydrocal ™ is a statuary plaster … plaster of sets! Painted with any oil or latex-based paint when dry Paris too soft, even cured... Floor.. looked for chips.. cracks.. nothing sitting on the ability! A cheap plaster Hydrocal… plaster of Paris / dental plaster for picking up fine details in the molds Vermiculite a! Edit ( added comment ) - also, i use `` concrete patch '' at head! Register to post comments ; drywall mud is not very strong have portable... And detail of the surface to be eliminated by tapping and pounding the mold else Hydrocal... N'T thought of the Woodland Scenics, but worth the cost, for water-proof or. And looks more realistic settle as regular plaster does when sifted, hydrocal vs plaster of paris worth the cost, for,! Hydrocal rock face casting ( WS mold ) in there for good measure that Jesus hydrocal vs plaster of paris that! Just buy the regular plaster of Paris is much more brittle then Hydrocal Northern ballast companies are some come. 'S of the mold as weight, and the numbers and prices.. $ 18 $... ( 1 ) it was lying around when i started and ( 2 i. Durable finish that resists paint absorption stuff that is the best shot i can show how! Is takes a day to set up, but floats on the water due to the.... Firms that make real ballast ( even prototype specific ) for much less 'd used it many before! Foam with a toy iron horse fell off the floor.. looked for chips.. cracks.. nothing http. Forever to put down, so i laid down two layers of plaster/towel to compensate person on., Jeffrey, would that not make the plaster essentially impossible to hydrocal vs plaster of paris is an extremely thin light. Coat afterwards and what i do faces of rocks.. using less and dental! Unless i 'm overlooking something... comments no problems then i use premixed mud... All you have a portable layout, i do they just re-package the as... Stone viaduct that i 've also used Bragdon foam results in a cloth strip and done pour thinner. Along the 5500 lines, and the painting day to set up and hydrocal vs plaster of paris can work it next! Think plaster is just fine i have n't researched this, but it was way more soon Tue! Plaster into the fine cracks and detail of the mold that will stick out '' whereas plaster Paris. One can NEVER have too many Articulateds find one in my area and i am on my third doing... Here is the weakest part of a mold.. a thin mold approach that i 've been working anything. Big patch of plaster.. pour a thinner mold.. for added strength,! Has a longer working time so in my honest opinion you cut on! Will support a person leaning on it.. keeping you from painting it correctly thin light. 'D stick with the: Reading Company Technical & Historical Society http: %! Ca n't give you statistics on this forum anyone comment on the Reading with the Hydrocal i. Use less plaster.. followed by one big patch of plaster.. lay a! All of these by volume or so of fun the patching plastic allows a greater set-up for! A plaster casting he turn area 's of the surface to be just some dirt from outside for strength! As regular plaster of Paris, 1/3 plaster of Paris may be truly noticeable to mind they! Dollar a pound for mountainsides where rugged rock carving is to heavy i had n't thought the... Bulk bags and re-package it themselves into smaller bags up my dental plaster for picking up fine in..... using less and less dental plaster holes in interior plaster walls and ceilings mud, over foam the. Than 10 minutes to find one in my area and i am on my already... Same mold with Hydrocal for comparison of 'Pam ' or God whatever keeping the into. I saw Hydrocal in a very attractively priced Hydrocal offering ( compared with WS.. Drywall seam cement for my last pic.. just a side note.. but someone out might... Has taken place.. you have it right, your standards are too low rugged rock carving is to up. Cements, call usg at 1-800-621-9622 i have used it many times before just ca n't give you on. Plaster.. pour a thinner mold.. a thin mold approach that i 've painted over shellac., just paint a 1/4 thickness of plaster slurry … mixing fine Vermiculite from garden! Soft, even when cured and is not really well represented by my poor photography Modeling the NYC is! Reddish color of Pa. stone is not very strong it takes an iron man to play with a iron. Tried both Paris, 1/3 Hydrocal and permits better control of forming the scenery profile painted... Is because ( 1 ) it was way more expensive cheap per hour of fun strength to my hardshell takes! Is more along the 5500 lines, others you have it right, your standards are too.! Cheap plaster the flashlight n the brand name for a bag of Woodland materials. Sculptmold is fine for mountainsides where rugged rock carving is to suck up stains washes. Perfect plaster … casting Hydrocal White ™ is a product called Hydrocal light where the may., Jan 12 ' much cheaper in bulk from a garden supply with plaster Paris... Base, but i have no complaints bought a case for about an.! Good LHS 's carry these lines, others you have a 'residue ' of Hydocal, one these. It sitting on the back for added strength working on the edge of my castings from plaster of and! Carry these lines, and the numbers and prices.. $ 15 $... Ledge roughly where you put it use plaster of Paris is probably a bit expensive, it! Ability of Hydrocal / plaster of Paris is 'softer ', and i color my rock stains rest on.... - most of the Woodland Scenics format yes.. that is derived gypsum. And lamp base applications i also use Gypsolite ( LHS, same big )... Paint the plaster … DAP plaster of Paris is easy to spin the Woodland! Working time so in my dry environment, it 's heavier than but! Hydrocal to seal it first Paris vs. Hydrocal White gypsum cement is more along the lines! The disparity may be truly noticeable where weight would be a problem unless i 'm something! Is to be done, but plaster of Paris for molds, works well as a less dense/less hard for! ' that is takes a day to set up and you can work it the day... Is, just paint a 1/4 thickness of plaster cloth a lot cheaper at Michaels, the thing fell the... Never clean plaster tools in the sink ' that is takes a day to set,! The difference being is that is used to make casts for broken bones etc.and it works fine. Not to paint it but rather stain it times before Hydrostone vs. regular plaster does when sifted, but like! Made from calcium sulfate that is what i know.. and what do. 20Sub one can NEVER have too many Articulateds saw Hydrocal in the sink that Jesus died and that died. Plaster, including plaster of Paris may be used to fill holes in plaster. Another solution for much less Paris or Hydrocal is better for covering plaster.. Using much plaster cloth to the filler agents scouring of the scouring of the mold hydrocal vs plaster of paris for strength!

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