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I need to make some molds, best (cheap) source of molding material?


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OregonFossil

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.

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oilshale
Posted (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 by oilshale
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Phevo
Posted (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 by Phevo
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OregonFossil

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.

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