Silver halide photographic light-sensitive systems

Details Silver halide photographic light-sensitive systems Silver halide photographic light-sensitive systems

C - Chemistry, Metallurgy

07

C

96/114, 260/549.

C07C 243/24 (2006.01) C07C 243/32 (2006.01) C07C 243/34 (2006.01) C07C 243/38 (2006.01) G03C 1/06 (2006.01)

Patent

CA 1332427

A B S T R A C T A silver halide photographic light sensitive emulsion containing a hydrazine of the general formula R3-NR4-NR5-G-X (I) in which: R3 represents an aryl group, one of R4 and R5 is a hydrogen and the other is selected from hydrogen, aryl sulphonyl and trifluoroacetyl, G represents carbonyl, sulphonyl, sulphoxy, phosphoryl or an N-substituted or unsubstituted imino group and X is a moiety such that at a pH in the range of 9.5 to 12.5 in the presence of an oxidised hydroquinone a cyclisation reaction takes place cleaving the moiety -G-X from the remainder of the molecule and forming a cyclic structure comprising atoms of the moiety -G-X.

541698

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