temperature sensitive ink

temperature sensitive ink is the ink that whose color can be changed with temperature. It includes: reversible fading ink, reversible coloration ink and reversibe discoloration.

Reversible fading ink: turning colorless in appearance after being heated and it can restore its restore its original color after being cooled.

Reversible coloration ink: is colorless in appearance but shows color after being heated and it can restore colorless after being cooled.

Reversible discoloration ink: its color can be changed into another one and it can restore its original color after being cooled.
temperature sensitive ink