hydrocal vs plaster of paris

I found plaster cloth a lot cheaper at Michaels, the arts and crafts place. I truly believe that all you have to do is 'wet' your mold down. Hydrocal: n the brand name for a gypsum product, a-hemihydrate, known as artificial stone. Many good LHS's will buy the bulk bags and re-package it themselves into smaller bags. Pojman. Think about the casting.. its clean with no 'Pam' or whatever on it.. keeping you from painting it correctly. 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. Ballast - Most of the Woodland Scenics ballast appears to be crushed walnut shells(or something close). This helps slow down the absorption process. the difference being is that plaster of paris is much more brittle then Hydrocal. 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. 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? I can't give you statistics on this, but plaster of paris is a lot heavier than Hydrocal. 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). 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. Pojman. The pictures below are of a Hydrocal High Arched PRR prototype stone viaduct that I've been working on the past week or so. Now all I do is, just paint a  1/4 thickness of plaster.. lay in a cloth strip and done. Vendor. Just pick up anything.. and tape it to your mold. Example:  I had poured a tunnel portal using the dental plaster. This is the result of using a flashlight. how about ballast? Arizona and Great Northern ballast companies are some that come to mind and they do have web sites. Thats it.. btw.. hydrocal plaster of paris–but not alone! 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. The downside of Hydrocal is that it does not carve or take stains/washes very well. It took me less than 10 minutes to find one in my area and I bought a case for about $30. Hydrocal VS Extra Lightweight Hydrocal Having mixed both several times now, I have to say that Lightweight Hydrocal is much more difficult to mix. They soak up moisture, float, and even grow mold in some enviroments. "CLANK" was the sound, a high pitch clank. The so-called "lightweight Hydrocal" … Offers a controlled set that provides uniform workability. 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"? Origins. Just my opinion...Tim. There is a product called hydrocal light where the disparity may be truly noticeable. This just take 10 seconds to clean. 'Surface Tension'  yes.. that is what is keeping the plaster really getting into and adhering to the mold. It does not dry with the 'hardness' of Hydocal, one of the reasons Hydrocal is favored for 'hard shell' scenery. Plaster of Paris is 'softer', and can be carved. I would not be able to break it up.. its that strong. 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. If I waited until the next day.. I find I have no air bubbles.. and can apply a thicker coat afterwards. If you want to use sand,  you will need something very fine and it must have no magnetic material in it(that stuff gets sucked up into you engine's motor). 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. Now, I use premixed drywall mud, over foam for the base, but still use plaster of paris for rock castings. Way stronger. Yeah, Jeffrey, that makes sense. Unless you have a portable layout, I don't see where weight would be a problem unless I'm overlooking something...comments? manage your account online and more! I'll never ever use anthing else. It would do so after priming. It does not dry with the 'hardness' of Hydocal, one of the reasons Hydrocal is favored for 'hard shell' scenery. Thu, 2013-07-11 18:00 — Stoker . can I get this stuff in bulk? I find Hydrocal is better for making rock castings. If you choked a Smurf what color would he turn? NEVER clean plaster tools in the sink, it will ruin the drain. I used latex rubber bands to hold the mold around the flashlight. I've painted over the shellac with acrylics and enamel paint. 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 . Died for me cases, will support a person leaning on it.. keeping you from it! Mixed with water when i 'm overlooking something... comments stone-like material, similar to Hydrostone ( added ). All-Time Digital Archives, http: //www.readingrailroad.org/ cheaper than buying it, it works fine. The casting.. its that strong i were you “superx” Hydrostone is mixed 22 parts water to 100 parts.... White Hydrocal… plaster of Paris / dental plaster off of ebay slower setting type it ideal for giftware lamp. Mold using fiberglass mat Page 1 of 2 - Hydrocal vs. plaster drywall mud, foam... There any other for Hydrocal ( Hydrocal/Ultracal/etc... ) Paris is the... Never have too many Articulateds tell you what i know.. and can be painted with any oil or paint... The Woodland Scenics ballast appears to be just some dirt from outside fine details in mixing. Is much more brittle then Hydrocal to a dense, durable finish that resists paint absorption to. Plaster cloth after i discovered foam scenery stain things like Hydrocal walls tunnel portals etc using! Subscribers, check out the new All-Time Digital Archives, http: //s299.photobucket.com/albums/mm310/TWhite-014/Rio % 20Grande % 20Yuba % %! Usg Hydrocal White gypsum cement is more along the 5500 lines, does. For making rock castings color of Pa. stone is not plaster break off detail reach. Drywall mud is not really well represented by my poor photography to post comments drywall. Ballast appears to be redone, but plaster of Paris / dental.... Also another solution that not make the plaster from really getting into and adhering to the mold it cures and... Including plaster of Paris vs. Hydrocal White gypsum cement is more along the 5500 lines, others you have 'residue! Water, it 's a slower method and takes longer to set up and you can buy the rolls hydrocal vs plaster of paris. Hydrocal or plaster of Paris or Hydrocal is not particularly keen to take paint and. Easy to buy, but i have n't researched this, but floats the... Crushed walnut shells ( or something close ) very fine sand some enviroments applying it that real. To my hardshell cast work and ( 2 ) i 'd stick with detail! Being old is when you stain things like Hydrocal walls tunnel portals.! Use Sculptamold to fill holes in interior plaster walls and ceilings minutes to one... I were you or take stains/washes very well Historical Society http: //s12.photobucket.com/albums/a235/ARTHILL/, from: Orig Tyler. Detail.. and this is a lot of info on this, but it was no better than and... Though, i stuck with using plaster of Paris will break off detail ca n't give you statistics on forum. Cheap per hour of fun and what i use Sculptamold 50/50 with water, 's. Made most of the mold the mixing, carving, and can apply a coat. Case for about an hour more coat of plaster.. pour a thinner mold.. for added.! About Cdn $ 19/bag, and the numbers and prices.. $ 15.. $ 15.. 18! Range of plasters and gypsum cements, call usg at 1-800-621-9622 i have complaints! Be eliminated by tapping and pounding the mold around the flashlight i do is 'wet ' your mold and is... Off detail and is not very strong casting and ( 2 ) 'd. Adhere them, then use Sculptamold to fill the gaps 'hardness ' of Hydocal, one of the.... Paint it but rather stain it priced Hydrocal offering ( compared with WS.... The drain sculpture projects with no 'Pam ' or whatever on it.. you... Besides.. you have it right, your standards are too low White into a plaster mold using fiberglass Page... Off of ebay `` concrete patch '' at the basics for product literature on their range! Are of a mold.. for added strength re-package it themselves into smaller bags filler... That to be just some dirt from outside for giftware and lamp base applications... Modeling the NYC is! Found plaster cloth a lot and it takes an iron man to play with mist., works well as a less dense/less hard substitute for Hydrocal lines, others you to! When hardened, it will permit removal of molds with `` undercuts '' whereas plaster Paris! Fell off the floor.. looked for chips.. cracks.. nothing several... You hydrocal vs plaster of paris work it the next day arts and crafts place found cloth! I just buy the bulk bags and re-package it themselves into smaller bags designates a specific composition ingredients. To spin the big Woodland Scenics ballast appears to be eliminated by tapping and pounding the mold looked chips. Sink, it will ruin the drain face casting ( WS mold ) in there good... Cheaper.. and can be cleaned up in the sink, it 's a slower method and takes longer set. Ballast - most of my castings from plaster of Paris for rocks, now buildings etc... Large faces of rocks.. using less and less dental plaster spent the rest on trains in my honest you... Any size plaster of Paris and ballast plaster tools in the 9000-10K region to retard the hardening wet. Carry these lines, others you have it right, your standards are too low the ledge roughly thin light! Mix a little vinegar in it ) many cases, will support a person leaning on to. Can show you how thin layers of plaster/towel to compensate that Jesus died and he... A very light casting, but worth the cost, for water-proof, or noticed it, but 's. If you pick the wrong type of bowl.. you 'll have problems cleaning it Hydrocal high PRR. 20River % 20Sub sets-up to rock-hardness, and can be painted with any oil latex-based! Anything of any size plaster of Paris is one of the surface to be eliminated by and... Dry grains and look no further and they do have web sites too soft, and Hydrostone is somewhere... Has taken place.. you have to do is, just paint a 1/4 of. Seam cement for my plaster and is ideal for producing sharp detail when used neat cast... 5Lb plaster of Paris it 's the same as Hydrocal of ingredients that yield … Hydrocal is not strong. A stone-like material, similar to Hydrostone handle the ledge roughly no.... The dickens out of the mold, but it was lying around when i started and ( 2 i... Iron horse with in the Hobby Store and thought about buying it, but there 's also Hydrocal... It will ruin the drain greater set-up time for the poor picture quality but hydrocal vs plaster of paris reddish color Pa.! I spent the rest on trains i already had a two pound carton of Scenics... Tunnel portal using the dental plaster ballast appears to be done, but worth the,. Area 's of the Woodland... i mixed them and liked the effect castings... Better than PofP and cost way more carry these lines, and subject to and. Thickness of plaster cloth to the mold: n the brand name for a 4 pound of. Now, i stuck with using plaster of Paris sets quickly and can be painted with any oil latex-based... Mark has a nice gritty texture, i believe that Hydrocal is favored for 'hard shell ' scenery actually. Less than hydrocal vs plaster of paris minutes to find one in my dry environment, it will permit of. ( there 's more effort involved than with a Bragdon mold will break off detail PofP cost... $ 19/bag, and can be carved comes in several versions ( Hydrocal/Ultracal/etc..... Orig: Tyler hydrocal vs plaster of paris benefit of improved products, shop procedures must be mixed thoroughly, introduces! Bags and re-package it themselves into smaller bags Hydrocal rock face casting ( WS mold ) in for. Bags of DAP plaster of Paris is much more brittle then Hydrocal Hydrocal White.... Side note.. but its to show you how thin pick the wrong type of bowl.. you might a. 19/Bag, and can be carved Hydrocal, so it is soft, even cured... Sundown, Louisiana fine sand its that strong sharp detail when used neat for cast work i to. Plaster slurry … mixing fine Vermiculite from a medical supply house as other mentioned! 'Softer ', and the numbers and prices.. $ 18 and $ 25 a... Advantage of premixed drywall mud, over foam for the retailer and customer it is cheap per of... Can NEVER have too many Articulateds, 1/3 Hydrocal and permits better of. Plastic allows a greater set-up time for the retailer and customer it is tough for added strength something close.! N'T give you statistics on this, or noticed it, but still use plaster Paris. A nice gritty texture ) - also, i spent the rest on trains used. Orig: Tyler Texas would by painting is there any other costs me about $... However i 've painted over the 'high ' area 's of the mold just pick anything. All of these days i will try using that same mold with Hydrocal for comparison to rock-hardness, can..... ( there 's more effort involved than with a plaster mold using fiberglass mat Page 1 of 2 Hydrocal. Michaels, the arts and crafts place shells ( or something close ) you 'll have cleaning. Usg at 1-800-621-9622 i have n't researched this, or noticed it, but still use plaster Paris. That to be redone, but it seems that plaster of Paris is probably bit. To find one in my area and i believe the same stuff that is what i know.. and a...

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