TIME AND TEMPERATURE DISPLAYING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a display material and a display device for displaying the change of time at a predetermined temperature or an arrival to a temperature-time integrating value and a predetermined temperature as the change of a color. SOLUTION: This display material comprises an A agent carried in a carrier and a B agent in an untouched state. A display part (1) for displaying time or temperature-time integrating value as the change of a color by bringing the A agent into contact with the B agent for reaction and a display part (2) for displaying an arrival to a predetermined temperature as the change of a color are integratedly formed. However, the A agent and the B agent comprise the combination of a pigment for changing a color by reacting to a radical generating agent and a radical and/or a pigment precursor.