Can anyone suggest an amine stable pigment brand? All the pigments currently are dispersed in epoxies.

I'm not up on resins so have no idea what amines are but I do work for a pigments manufacturers so may be able to help from that side.

I would think you could use some of the metal oxides as these are quite stable as a finished pigment and have good light and heat resistance.

problem is some are controlled regarding what you are allowed to use them in so you would have to have a read up.

Iron oxide may work but colours are limited, you can get a black.

other problems will be mixing/wetting the pigment as epoxy manufacturers will use sheer mixers to thoroughly mix the pigment, you could try a long period of wetting between mixing.

Because I'm not clear on the Amine id say a test sample will be a definite.