Photographic products and processes employing triarylmethane...

Details Photographic products and processes employing triarylmethane... Photographic products and processes employing triarylmethane...

C - Chemistry, Metallurgy

09

B

96/185, 260/321,

C09B 11/10 (2006.01) C09B 11/06 (2006.01) G03C 1/10 (2006.01) G03C 1/54 (2006.01) G03C 1/83 (2006.01) G03C 8/48 (2006.01)

Patent

CA 1174239

Abstract of the Disclosure The present invention is concerned with photographic products and processes, particularly diffusion transfer products and processes employing certain novel colored triarylmethane compounds possessing in their triaryl structure a 4'-oxo-1'-naphthylidene (or a 4'-oxo-1'-phenylidene) moiety, a naphthyl (or phenyl moiety) and a phenyl moiety substituted in the ortho- -position to the central carbon atom with a non-nucleophilic group that can- not add to the central carbon atom but in alkaline solution undergoes an irreversible cleavage reaction with base that is complete within a predeter- mined time at a predetermined alkaline pH to provide a nucleophilic moiety that adds to the central carbon atom to form a ring-closed compound which is colorless.

367492

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