![]() Weighing the slurry in a container of known volume. Since water-to-plaster ratios effect absorption, strength, and mold performance, they should be continually checked by Plaster and water should be contained at room temperature. A controlled temperature setting will provide the best results. The purest water available should be used almost all drinkable water is suitable. Successful mixing and use of industrial plasters requires following specific standards and procedures: This equals 4.17 gallons water per 50 pounds dry pottery plaster. USG Pottery Plaster Mix For Wedging Tables:įor wedging boards or tables mix 70 parts of water to 100 parts plaster. HELPFUL HINTS FOR MIXING PROCEDURES FOR DRY PLASTERS USG Gypsum Plaster Selection Guide, Hints Tips, Below these products We also supply Bentonite, fireclays, slip and many other materials used by artists and craftsmen to create castings. Please call us toll-free at 1-88 to order large quantities of the items on this page. Now for the not so good news.These products can only be carried by certain U S Gypsum dist.,due to their sensitive storage needs.This is straight from USG Chicago office.When I lived in Chicago ,there were only two places I could get these products,one in Cicero,one on Grand Ave.,and this was Chicago!Moved to rural Colorado,now the fun really began.Yep,I got it!,took weeks of calling and checking around.This is how I learned how hard it was to get if you don't live in a city.First it was going to be loaded on a truck out of San Diego,turns out they weren't allowed to handle Hydrocal.Next I found a place in Grand Junction who would go to Denver just to get my Hydrocal&Dental Stone!You can't stop a model railroader,so $35 a bag,60 mile ride to GJ,Igot my precious supplies.So,you can get large bags,it may take some real effort,but look at the stories you get to tell.This page contains items related to plasters and casting materials by US Gypsum.īulk discounts are available for these US Gypsum products. ![]() Over the years I've used over 1500# of Hydrocal, and let's not forget Dental Stone,the real deal for casting rock molds.I've always bought these items in 80-90 pound bags. On the positive side, think of it as building a layout that will last a looooong time. This toughness can make things difficult because it is pretty difficult to carve or change things after the stuff has set up (unless you break it out and start over). I personally still prefer hydrocal because it is so tough. I have several buddies who like casting plaster better than hydrocal. Takes longer to set up and has the wrong texture. There is another product by the same maker called hydrostone: Avoid it. (not Home Depot) I think they use it to repair old plaster in houses built in the pre-drywall era. I reccomend finding the supply house in town that services lath and plaster construction workers and remodelers. It sets up hard enough to scrape your knuckles on it. ![]() The only way to remove it was to wail with a sledge. The stuff was so hard that when I was taking down the layout, it bogged down a sawzall. I love hydrocal and found the whole carving thing to be very therapeutic. ![]() feet of rocks on my last layout and I went through about four 100 lb.bags (I covered a layout 4x16 with mountains). I concur with the other posts about hydrocal being very strong. ![]()
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