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Glass Casting and Mold Making: Glass Fusing Book Three, by Boyce Lundstrom has a number of mold mixed that you can make for not too much. The key one is the 50/50 mix by weight of Pottery Plaster and Silica 200. This makes a mold that usually only lasts for one firing. Adding things like Hydroperm, ...

This is Boyce's son, Patrick Lundstrom. I'm sorry that I did not catch this earlier. Yes, Boyce passed in December of 2012. I spent much of the following year trying to figure out what exactly I was dealing with and how to deal with it. In October of 2013, I was in the process of moving out of Ocean...