| 摘要 |
PROBLEM TO BE SOLVED: To provide a reversible thermochromic stamp capable of performing continuous stamping, and forming a clear and sharp stamping image without causing such problems as leaking and dropping of ink from a stamp surface of a stamp material, and unevenness of ink discharge.SOLUTION: A reversible thermochromic stamp includes: ink for a reversible thermochromic stamp containing reversible thermochromic microcapsule pigment including a reversible thermochromic composition that includes (1) a component consisting of an electron-donating colorable organic compound, (2) a component consisting of an electron-accepting compound, and (3) a reaction medium which reversibly induces an electron donating-accepting reaction between the components (1) and (2) in a specific temperature range, water and a humectant; and a stamp material having continuous pores. A compounding ratio of an amount of ink injection to the stamp material and the humectant of the ink is caused to be a specific ratio.SELECTED DRAWING: Figure 4 |
