| 摘要 |
PURPOSE:To improve heat resistance, light resistance, fixing performance, thermal diffusivity, chelating properties and a hue by forming a heat-sensitive layer including a specific dyestuff onto a support. CONSTITUTION:A heat-sensitive layer containing a dyestuff shown by formula I is formed onto a support. In formula I, X represents an atomic group required for forming the nitrogen heterocycle of a five-membered ring or a six-membered ring having aromaticity, and the nitrogen heterocycle may have a substituent group and the ring may form a fused ring with another carbon or a heterocycle. Y represents a halogen atom, an alkyl group or an alkoxy group, (n) 0, 1 or 2, R<1> a hydrogen atom or the alkyl group, and R<2> and R<3> the hydrogen atom, the alkyl group or an aryl group separately independently, and these R<2> and R<3> may bond mutually and form the heterocycle of the five-membered ring or the six-membered ring. Accordingly, heat resistance, light resistance, fixing performance chelating properties, thermal diffusivity and a hue are improved. |
