tschmi13 Posted June 22, 2014 Report Share Posted June 22, 2014 Does anyone know what the packing material inside old orton cone boxes is? The new ones use foam but the old ones use some other lightweight particles/chunks. I have always mixed these with my clay when I am making cone packs and it seems to help the moisture in the pack evaporate faster. It is so lightweight and seems like it would burn out but actually creates a nice aggregate in the clay of the cone pack and I thought it might be worth mixing into a clay body for a nice variation.... if I knew what it was and where to find more! Link to comment Share on other sites More sharing options...
Wyndham Posted June 22, 2014 Report Share Posted June 22, 2014 I think it is Vermiculite Vermiculite is a hydrous, silicate mineral that is classified as a phyllosilicate and that expands greatly when heated. Wyndham Link to comment Share on other sites More sharing options...
Guest JBaymore Posted June 22, 2014 Report Share Posted June 22, 2014 And the old vermiculite packing is likely contaminated with asbestos. See the history of vermiculite processing in the US for background on that. best, ....................john Link to comment Share on other sites More sharing options...
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