Blue to white Thermal powder.
This is a color change powder that works by change in temperature. Whether you have a mug of coffee you want to see quick amazing color change on or your doing crafts that you want to add the element of surprise to, this is your ammo. Amazing thermal at 22c temp change.
This is a 10 gram bag and it takes very little to see the magic happen.
Power form such as a mica. Simple to dilute with a few drops of alcohol and be on your way to fun amazing projects.