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making an investment

Posted: Tue May 12, 2015 10:23 am
by Andrea R
Its been sometime since I made a plaster mold and I cant remember what all goes into it.
Can someone please give me the recipe.
Thank you,
Andrea

Re: making an investment

Posted: Tue May 12, 2015 10:49 am
by Brad Walker
The classic recipe is 1/3 plaster, 1/3 silica, 1/3 water by weight. Proportions can be close to those ratios and still work. There are lots of other recipes.

Mix dry ingredients together first, then add to water.