| 摘要 |
PURPOSE:To improve durability and prevent deterioration of S/N after high-temperature storage after recording, by forming a recording layer with a coloring matter-resin components connected with a special connecting group. CONSTITUTION:A recording layer is composed of coloring matter-resin component connecting more than two molecules of coloring-matter of one or more than two kinds to a resin through the specified connecting group. The connecting group represents one of higher than 2 valences including one -COO- group or more than two -COO- groups. In case of the latter provided with connecting groups of 2 valences or more than 3 valences, COO or OCO is located on the two or more than three connecting ends. The photo-recording layer of this kind features insignificant deterioration of filling-in sensitivity and S/N even for a long period of storage. Especially, deterioration of the S/N of reading-out after a high-temperature storage after recording becomes exceedingly insignificant. Further, the S/N of the reading out is extremely high. |
