HEAT RESPONSIVE MICRO-CAPSULE

摘要

PROBLEM TO BE SOLVED: To provide a heat responsive micro-capsule capable of being collapsed, sensitively by heating in a short period of time, in the heat responsive micro-capsule collapsed by the heating at a predetermined temperature or higher. SOLUTION: At least a pyrolytic foaming agent and a coloring material are contained in the wall film of the micro-capsule. The foaming agent is decomposed at a predetermined temperature or higher and N2 gas or the like is generated whereby the wall film of the micro-capsule is collapsed sensitively at an arbitrary temperature and the coloring material is fixed to a substrate.