Review on Vibrant and Non-Toxic: LET'S RESIN Epoxy Resin Dye - 15 Color Translucent Pigments for Resin Coloring, Epoxy Resin, Resin Molds by Hannah Curi

This material is great! You only need a drop or two to get a nice vibrant color and the colors are so pretty. and since you only need a little, these bottles last a very long time. The only real problem I have is that a few colors change when I cure them. Sapphire blue turns to a topaz-like shade of yellow, and purple turns to brown (but only a little). I don't know if it's because I'm using a UV resin instead of a two-part resin, but only these two colors will do. Luckily there's a second blue in the pack and I could mix red and blue to make purple so it doesn't bother me too much. although it sucks for that sapphire blue. It's such a beautiful deep shade of blue before I cure it. although other colors work great!