... temperature has:7—13°C,26—31°C,38—43°C,46—51°C,60—65°C Reversible Temperature sensitive ... screen,intaglio Shallow color warming 60—65°C Demonstrates the color Reversible Temperature sensitive ink ... screen,intaglio 7—13°C, 26—31°C, 38—43°C,46—51°C, 60—65°C Irreverisble Temperature sensitive ... There are Four kinds of temperatures65°C,80°C,100°C,120°C Irreverisble Coloration Temperature sensitive ink(Blue ...