OregonFossil Posted May 8, 2021 Share Posted May 8, 2021 Mostly small fossils (think less than 20mm, many 2 to 3 mm). Maybe a pound or two. Brands on Amazon, other sources? The molds would be used to photograph for fine internal and external detail from casts. I am clueless when it comes to this. Link to comment Share on other sites More sharing options...
oilshale Posted May 8, 2021 Share Posted May 8, 2021 (edited) My former employer manufactures silicone-based molding materials. The brochure describes the process quite well. Too bad you live in Oregon, otherwise I could have gotten you something. Elastosil.pdf Edited May 8, 2021 by oilshale 1 Be not ashamed of mistakes and thus make them crimes (Confucius, 551 BC - 479 BC). Link to comment Share on other sites More sharing options...
Phevo Posted May 8, 2021 Share Posted May 8, 2021 (edited) Not entirely sure if it is available in the US, but I use a product called SILASTIC 9161 RTV for all my casts whether positive/negative, usually gastropods ranging from 1mm - 40mm long For better pictures some people coat the cast in ochre to better catch light Edited May 8, 2021 by Phevo 1 Link to comment Share on other sites More sharing options...
OregonFossil Posted May 9, 2021 Author Share Posted May 9, 2021 Thanks for the suggestions. The casts I have are pretty small, and so are the molds. Have found SILASTIC 9161 RTV and will try it. Link to comment Share on other sites More sharing options...
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