Photographic silver halide materials containing aryl hydrazides

Details Photographic silver halide materials containing aryl hydrazides Photographic silver halide materials containing aryl hydrazides

C - Chemistry, Metallurgy

07

D

96/121, 260/290.

C07D 213/04 (2006.01) C07D 213/20 (2006.01) C07D 213/22 (2006.01) C07D 213/30 (2006.01) C07D 213/38 (2006.01) C07D 213/59 (2006.01) C07D 213/61 (2006.01) C07D 213/65 (2006.01) C07D 213/73 (2006.01) C07D 213/74 (2006.01) C07D 213/75 (2006.01) C07D 213/79 (2006.01) C07D 213/82 (2006.01) C07D 215/10 (2006.01) C07D 217/10 (2006.01) C07D 233/61 (2006.01) C07D 401/04 (2006.01) C07D 417/12 (2006.01) C07D 521/00 (2006.01) G03C 1/06 (2006.01) G03C 1/12 (2006.01)

Patent

CA 2036948

TITLE Photographic Silver Halide Materials Containing Aryl Hydrazides ABSTRACT OF THE INVENTION Photographic silver halide materials containing aryl hydrazides as defined and novel aryl hydrazides with a cationic group in the acyl radical enables the preparation of photographic materials that can be developed rapidly to ultrahigh contrast at a relatively low pH value. The photographic materials are useful in reprography, particularly screening for halftone images,

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