| abstract |
(57) [Summary] Discoloration performance according to environmental conditions (temperature and / or humidity) and elapsed time can be exhibited over a long period of time. Provided is a discoloration time-lapse indicator capable of confirming discoloration more clearly. Kind Code: A1 A discolorable time-lapse indicator having a discolorable ink layer and a non-discolorable ink layer that changes color according to temperature and / or humidity and elapsed time on a substrate, the substrate, the discolorable ink layer and the non-discolorable ink. A color-changing property, characterized in that a color-changing ink layer and a non-color-changing ink layer are formed on the color-separating layer so that a part or all of the color-changing ink layer is exposed to the outside air. Pertains to a time indicator. |