| 摘要 |
[Problem] To obtain: a thermochromic composition in which a novel color change temperature regulator is employed and which is provided with a broad hysteresis width; and microcapsules thereof. [Solution] The problem has been resolved by a composition which comprises a leuco dye, a color developer and a color change temperature regulator, wherein the color change temperature regulator is at least one of compounds (a) to (e). [Effect] According to the present invention, a thermochromic composition having a broad hysteresis width can be obtained using a novel color change temperature regulator.
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