I use diatomacious (sp) earth (DE) as a filter medium in my swimming pool filter. I have often wondered if this material which I think is the fossils of marine crustaceons (sp) would be any good as a filler for resins. It seems to have a lattice or crystalline structure. As with talc, cautions against breathing it are on the package.

It dates me, but we used talcum powder (baby powder) on our bamboo slide rules to keep them sliding fast. You could tell an engineer geek by the baby powder smell on his slide rule.

Comments please. Thanks.

Regards,

Richard