20g of Thermochromic Temperature Activated Pigment Powder - Heat Sensitive Color Changing Powder for Slime, Paint, Resin, Epoxy, Nail Polish, Ink, Screen Printing, Fabric Art, Casting (Red)

This powder works in resin casting/epoxy. The color difference is noticeable and the color is as described. Not sure why people complained about the size of the product. A little goes a long way. I used 1/8 teaspoon of powder in 60ml of epoxy mixture and got 4 keychains and a set of earrings.

I've had a bad batch before but overall it's a great product. The replacement for the bad bag was here in two days and worked . I have to use more pigment to binder ratio(1:1) than I originally was told (20:1) ...BUT I found this specific brand way better at becoming completely transparent more than some of the others on Amazon . I have bought the Black to colorless and the magenta to "colorless" . Black is perfect but magenta turns into light pink not clear. Like ever... No matter how much you mess with the ratios it never turns clear ,BUT it's still pretty .

Used this in my 3-6 year old classroom to make color changing slime. It worked ok but really didn't change color dramatically. It would get a lighter red color but never completely white unless you put hot tap water on it. Kids loved to play with it nonetheless and really went crazy when I took a piece of it to the sink and ran hot and cold water over the slime to really show how the color change!

Worked great in the bag- but once I mixed it into resin it did nothing, even at different amounts

I never knew this powder existed and now I want to put it in everything. My niece and I made slime and it went splendidly! It was a definite upgrade for the slime and made for a fun science experiment feel. We've made two batches and there's still so much powder left.

For my projects I tried mixing the pigment with gloss varnish and print ink extender. Both instances the pigment mixed very well with the mediums and reacted to temperature once dried. I was worried that it wouldn't react to a person's hand, but it did change color. Just be careful when working with the powder because it's very fine and easy to get everywhere if you're not careful. A little goes a long way!

The red colored powder did not change. I tested it with ice and heat in the package that it came in and it did not change. It also was a MUCH smaller package than was shown in the picture (tiny little bag came /picture made it look the size of a person’s hand). I requested a refund, sent the unused powder back as directed, and received a refund. A while later, I got a notification that they never received my return and recharged me for the powder. I printed the refund slip and followed directions for returns, so I don’t know what happened. Very disappointing. I ordered the powder for a school project, it didn’t work, then I sent it back and still was charged and have NOTHING to show for it.

Well since the day was so hot with this summer heat I didn't see much of a color change removing it from the package. So I took a frozen bottle of water and set it on the package and the color change happened. It is a good product will be buying more.