Thermochromic sheets self-adhesive and made with using a thin layer of Liquid Crystal that has been printed on to a black background.
Liquid Crystals are organic chemicals with twisted helical molecular structures, which expand, or contract.
The heat of your hand will cause the temperature of the sheet to change, resulting a colour change of red, green and blue.
Ideal for educational purposes, demostrating to students and colleagues.
Cut into your desired shape and stick onto your desired surface.