| 摘要 |
PROBLEM TO BE SOLVED: To cope with short wave lengths, provide a high sensitivity, and also stabilize a coloring matter film by using a recording layer of which the main component is a styryl-based cyanin coloring matter represented by a specified formula, on a resin substrate. SOLUTION: A recording layer of a resin substrate has a major component of a styryl based cyanin coloring matter represented by a formula (in the formula, R<1> represents an alkyl group or which the number of carbon atoms is 1 through 18, an aryl group or a hydroxyal group, R<2> represents an alkyl group or an aryl group, a negative ion X<-> represents I<-> , Br<-> , or CH3 -C6 H4 -SO3 <-> , Y<1a> and Y<1b> both represent a nitrile group, a hydroxyl group, a carboxyl group, halogen atom, Y<2> represents -NH2 ; -N(R<3> )2 (in the formula, R<3> represents an alkyl group of which the number of carbon atoms is 1 through 7, or an aryl group); -N(R<4> R<5> )2 (in the formula, R<4> and R<5> individually independently represent an alkyl group of which the number of carbon atoms is 1 through 7, or aryl group); an alkyl group having -NH2 , -N(R<3> )2 of which the number of carbon atoms is 1 through 18, an aryl group or an alkoxyl group; a nitrogen composition-containing derivative selected from an acetamide group, and an electron donating group of an alkyl group). |
