| 摘要 |
PURPOSE:A light recording medium of heat mode having improved deterioration in reproduction such as deterioration in S/N ratio, etc., improved light resistance, a little deterioration in physical properties caused by storage in a lighted room, obtained by adding a cyanin dyestuff, etc. and a specific recording layer. CONSTITUTION:A cyanin dyestuff [preferably compound shown by the formula phi-L=psi(X<->)m (phi, and psi are indole ring, etc. in which aromatic ring may be condensed, etc.; L is connecting group to form mono-, di-, tri-, or tetracarbocyanin dyestuff; X is anion; m is 0, or 1)], or it and a resin (e.g., polyolefin, etc.) are blended with (B) a quencher shown by the formula I or formula II (R<1>-R<4> are H, or monofunctional group, R<1> and R<2>, R<2> and R<3>, R<3> and R<4> are may be linked each other to form 6-membered ring; R<5> and R<6> are H, or monofunctional group; M is transition metal) in a molar ratio of the component B to the dyestuff of preferably (0.1-1.2):1 to give a recording layer. The recording layer is formed on a substrate to give the desired medium. |
