Thermochromatic inks and applications inquiry.

Hey there, I’m an interior designer who’s based in melbourne, Australia and is currently seeking any relevant information regarding thermochromatic inks/pigments/paints and plastics. Does anybody know where i might be able to get samples of this product? Also the temperature range I am interested in for the colour change is around body temperature. So as a surface comes into contact by say your hand it leaves a handprint of a different colour and maybe in a few seconds later goes back to its original colour as the heat wears off. Please please if anyone can give me valueble information regarding my inquiry do so, u can e-mail me direct at and use Thermochromatic as your subject heading! Thank you! :unamused: