ATLANTA CHEMICAL ENGINEERING Low Temperature Cold Activated Thermochromic Bi-Color Pigment YELLOW changing to RED at 59F/15C

I've bought the Yellow-Red @59, Red-Yellow @77, Black-Clear @77, Black-Pink @88, Red-Clear @88 and tried almost all of them. My first attempt was to put Red-Clear @88 and Black-Clear @77 in some big box epoxy and inject it into a ring mold... that worked great and the color is super red. Two things I immediately discovered: 1) You can't expect a powder pigment to turn crystal clear. It turns translucent/opaque white. I don't know why I expected a powder to disappear 😅. 2) Finger 'body' temperature is WAY below 88F in the winter... so only the Black-Clear 'kicks' and only a little... In the summer I'm certain to have the perfect disappearing ring. Once I got an idea of how it mixed and reacted to the epoxy I went full in on a new project. I poured some TotalBoat epoxy in a knife handle blade to 90% full, let it kick for a bit, then mixed in Red-Clear @88 and drizzled it on top. I was totally blown away. It looks amazing... the red is so vibrant. I just eyeballed the amount to use and it came out great. Last I had a rainy Sunday project with my daughter. we poured some top coat nail polish into a cup and mixed in some pigments and did different nails. Then top-coated them in clear. The best temperature reaction I think is the Yellow-Red @59. Super fun and she loved the process. And according to their instructions, while you shouldn't eat the stuff, it is safe to handle. This stuff is awesome and I'm working on ways to incorporate all the color/temp combos in my work. It's going to be great to have different dimensions of effect that 'kick' at varying temperatures. Just need a truly-clear transparent! 🤣 But instead of that I'd do with a Red-Clear @77... ooooh.. or Clear-Red@77! SCIENCE MAKE IT HAPPEN!

Love the color change. Easy to mix into slime. Decent price. Made a good batch with one of these.

You have to also purchase a binder if you want to dye fabric. I have not tried it on nails yet.