| 摘要 |
PROBLEM TO BE SOLVED: To provide a sold writing implement which is good in writing performance and color development and excellent in strength and impact resistance.SOLUTION: A solid writing implement 1 includes an inner core 2 which comprises a reversible thermochromic microcapsule pigment including a thermochromic color-memory composition comprising (a) an electron-donating coloring organic compound, (b) an electron-accepting compound and (c) a reaction medium causing reversibly an electron giving/receiving reaction between (a) and (b) in a specified temperature range, an excipient and a resin and an outer shell 3 which comprises an excipient, a filler and an elastic resin and covers the outer peripheral surface of the inner core. |
