Temperature Activated Thermochromic Color Changing Pigment Perfect for Color Changing Slime (Yellow-Red 59F/15C)

This RED-YELLOW pigment works well for slime. The temperature of just your hands is enough to initiate the colour change from coral to orangey-yellow and yellow. If you use a cold jell pack on it you can change the colour from a coral to a deeper red. The visual effects were really good and the children enjoyed playing with the slime to make the colour change. Easy to blend into the glue when mixing. But expensive if you are just making slime at home, as one 10g jar can make one bigger batch of slime (2 bottles of 4oz of glue) or two smaller batches of slime (1 bottle of 4oz glue each batch). Great for school STEAM activities though, as schools would have an expense budget. The recipe I used was as follows: 1 4oz bottle white glue, 1/2 to 1 teaspoon baking soda, 2 teaspoons contact lense solution. The BLACK-PINK product wasn't good. The colour when mixed with white glue is dark purple. It doesn't seem to change colours with the heat of your hands when handled. Did not get it to go pink at all, perhaps it needs a stronger heat source? It changes to black when an ice pack is applied. Not a great visual as the disparity between the dark purple and the black is not great. Wouldn't recommend.

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!

I previously bought the 82F° pigment and wanted to test how much time it takes to go from colorless to the original state compared to this pigment (77F°). When placing a hand on the pigment mixed with acrylic paint, it took between 35-65 seconds. For the 82F° pigment, it took between 15-35 seconds. I tested it on 25-lb paper, 80-lb cardstock, 65-lb cardstock, tape, and wood. I tested it with clear nail polish, transparent glue, white acrylic paint, acrylic paint matte finisher, and clear ink. It works really well on lighter paper. The pigment's color is not completely black—it's more of a dark grey. So, if you mix it with white, it will turn into a lighter grey. It dries fast and doesn't leave residue after applying. Because the pigment seems to spread out, ensure that something is underneath the container when using it. Then, you can put it back in the container. If you want a slower return, this one is the choice.

I have been doing my own nails for a few years now and tend to lean towards the dip powders that change color with the temperature. After I came across a video of someone making their own powder I wanted to give it a shot. I took a chance with this product and mixed it with clear dip powder, after a couple experimental fake nails I got the consistency I wanted. This product went above my expectations and was a lot easier to use than I anticipated.

Very interesting product with a myriad of uses. Silk screening t-shirts, school projects, arts and crafts, temperature sensor, pranks, etc. The product is opaque in use, so if you're looking for translucence in your finished product, this probably isn't for you. One thing to pay special attention to is the activation temperature regarding your particular use for the product. You don't want it too low where it's always activated or too high where it never changes. Once you've got that figured out, the sky is the limit.

The temperature range on the black to yellow isn’t as useful as the others which is a shame as it’s quite dramatic. The yellow-red is amazing.

I purchased the Black - Yellow 82 degree thermochromatic powder for a large project at the library. We used the powder to make color changing slime when activated by body temperature. I contacted Atlanta Chemical Engineering LLC to make sure I was purchasing the correct temp powder so that it would change just by body temperature, and not by heating or cooling with other catalysts. The product works wonderfully! It is black when on a surface (bowl, table, etc) and turns bright yellow when held in your hand! Be advised, everyone has different body temps, so if your hands are cold, it might not change for you. I had the kids place the slime on different body parts (hands, arms, neck, forehead) to see how the color changed. FYI forehead works great and the kids think it's hilarious! Overall, what a great product! The customer service was fabulous! If you have any questions, please contact them first before purchase because they can advise you on your particular project.

This product works amazing. Do yourself a favour and get them. I got the 10 gram black to colourless and omg.. There was so much more than what I thought there would be. I also got their 3 pack 5gram,and same. So much in the tubs. You only need a little tiny bit to achieve what I used it for. Love it and will definitely get more soon. Thank you!!