We suggest only using color pigments, mica pigment powder, alcohol inks, and dyes compatible with epoxy. We recommend that you use a 12% color before the curing process is affected. Remember, the higher percent of color you add, the less chance of a perfect cure. If you go too high, your project will not cure. This percentage is more than enough to create an opaque finish, but also allows for a smaller percent to achieve a translucent finish. You may want to do a test area first.