Here, I stumbled on this commercial recipe site some time ago. Most of the recipes are for the basf co. pigments and I just wasn't in the mood to figure out HOW un-natural they are. Plus it was starting to look alot like chemistry.
http://www.basf.com/businesses/coatc...e_of_3116e.pdf
Additionallly, in the preliminary research I did on powdered pigments, some can be volatile....more chemistry.
eta; not explosive volatile but nasty metal content.
Katie