[Gwendeanne]

I've never used any stains before. I'm getting ready to start experimenting.
I've been pouring a tumbler cup mold with just plain white porcelain slip, into a plaster mold I made. If I add mason stain to the slip would it stain the plaster mold? If it does, would it effect or contaminate the next pouring w/o stain? I hope that makes sense. I just want to try and color my slip, but don't want it to ruin my plaster mold.

Thanks,
Gwen

[INYA]

Gwendeanne, on 24 April 2012 - 02:39 PM, said:

I've never used any stains before. I'm getting ready to start experimenting.
I've been pouring a tumbler cup mold with just plain white porcelain slip, into a plaster mold I made. If I add mason stain to the slip would it stain the plaster mold? If it does, would it effect or contaminate the next pouring w/o stain? I hope that makes sense. I just want to try and color my slip, but don't want it to ruin my plaster mold.

Thanks,
Gwen

No, it will not stain the mold.

[bciskepottery]

I've had mason stain -- mixed with a porcelain slip made from clay and applied as decoration on slabs -- leave color stains on plaster hump/slump molds. I know there are body stains -- that are added to white slip for coloring -- but have not used them in molds.

[icyone]

I think it would be best to try it on an old slip mold first. Whenever I use my red slip it stains the molds and almost everything else. So much that I use specific molds just for my redware slip.

I see you're in Colorado. If you don't have an old or extra slip mold if you want send me a message with your email or address and I'll mail one out to you. I'm in Centennial.

[Gwendeanne]

Thanks All. Icyone, I do have some old molds to experiment with...Thanks for offer and the heads up on the red stain. At the moment I don't have any red stain, but in the future I will be aware.