Cyanine dyes

Details Cyanine dyes Cyanine dyes

C - Chemistry, Metallurgy

09

B

260/328, 260/349

C09B 23/02 (2006.01) C09B 23/04 (2006.01) C09B 23/06 (2006.01) G03C 1/18 (2006.01) G03C 7/02 (2006.01)

Patent

CA 2006120

21 Abstract The invention relates to chemical substances with dye properties, espcecially improvd cyanine dyes and their application in the photographic bleaching process. A chromylium group on the hetero ring will therefore maimnly have either a substituted phenyl group or an alkyl group. In particular O-halogenated phenyl and t-butyl have proved to be the best substutents.

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