... and temperature card ,when you press it ,it can change color ,each color is different ! stress card(pvc card) is a type ... ,has a chip when you press it ,it can change color ,each color is stead of different mood and different temperature! Specifications: ... , special varnish for client over printing ,UV, Lamination3, Color : four color( four color process) in front and back, or pantone color4,Additional ...