Silicated Plaster Recipe Needed

suntoys · Post by **suntoys** » Sun Apr 18, 2004 1:19 pm

Does anybody have a recipe for the combination needed to mix silicate powder and casting plaster for mold making? Thank you.

rosanna gusler · Post by **rosanna gusler** » Sun Apr 18, 2004 5:30 pm

i do it by weight. 1:1:1 . this is a fairly thick mix. you can reduce the dry a hair if you want. rosanna

suntoys · Post by **suntoys** » Sun Apr 18, 2004 5:35 pm

Thank you very much. I hope that everybody that's looking at this post can appreciate this.

Wallace Venable · Post by **Wallace Venable** » Mon Apr 19, 2004 4:48 pm

I use equal parts of:
Plaster of Paris (from Lowes)
Diatomateous Earth (swimming pool filter media from Walmart)
to which I add about 5% kiln wash (Hot Line or Bullseye)

It may not be "the best" mix, but the only exotic stuff is the shelf wash, which you should already have.

This mix can be reused several times if kept below about 1450Â° F.

I've run over ten slumpson a single mold when bending stained glass panels for "Tiffany" replacements.

Barbara Cashman · Post by **Barbara Cashman** » Mon Apr 19, 2004 7:58 pm

Wallace Venable wrote:I use equal parts of:
Plaster of Paris (from Lowes)
Diatomateous Earth (swimming pool filter media from Walmart)
to which I add about 5% kiln wash (Hot Line or Bullseye)

It may not be "the best" mix, but the only exotic stuff is the shelf wash, which you should already have.

This mix can be reused several times if kept below about 1450Â° F.

I've run over ten slumpson a single mold when bending stained glass panels for "Tiffany" replacements.

Does this mixture shrink when you use specifically for the replacement bent panel lamps? - Barbara