Classes of non-sensitizing infra-red dyes for use in photosensit

Details Classes of non-sensitizing infra-red dyes for use in photosensit Classes of non-sensitizing infra-red dyes for use in photosensit

1998-02-10

1999-08-10

Powers, Fiona T.

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

548427, 548455, C09B 2308

Patent

active

059360860

ABSTRACT:
A novel class of non-sensitizing infra-red dyes derived from heptamethine dyes with indolenine nuclei is disclosed. They are useful as filter-, acutance- or antihalation dyes for photographic elements based on silver halide or for photothermographic elements.

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Harada et al., Chemical Abstracts, 124:274366 (1996). Abstract of JP 07-333,784.

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