| 摘要 |
PROBLEM TO BE SOLVED: To provide an IR absorbing compd. fit for use as an antihalation dye, an acutance dye or a filter dye in an IR sensitized photographic material or a thermographic material. SOLUTION: At least one of photosensitive layers contains an IR absorbing compd. represented by the formula or its outer salt. In the formula, Z is H, one or more substituents or atoms required to complete a condensed arom. ring, each of R<1> and R<2> is H or optionally substd. 1-3C lower alkyl, R<3> is optionally substd. 1-3C lower alkylene, R<4> is optionally substd. alkyl or aryl, each of L<1> -L<7> is optionally substd. methine and Y is H or one or more substituents.
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