| 摘要 |
PURPOSE:To enable a recording film to be provided directly on a base by coating and enhance productivity, by incorporating a specified cyanine coloring matter and a quencher in the recording film. CONSTITUTION:A recording film is provided on a base formed of a plastic material, and comprises a cyanine coloring matter of formula I, wherein R1 and R2 are each alkyl group of 3 to 6 carbon atoms. The recording film further comprises a quencher of formula II, wherein each of R3, R4, R5 and R6 is hydrogen or a substituent group. The recording film comprising the quencher and the cyanine coloring matter is provided by coating, e.g. by a spin coating method. The thickness of the recording film is about 40-100 nm. |
