Photoimaging systems with cyclic hydrazides

Details Photoimaging systems with cyclic hydrazides Photoimaging systems with cyclic hydrazides

G - Physics

03

C

96/158, 96/174

G03C 1/00 (2006.01) G03C 1/73 (2006.01)

Patent

CA 1131491

IMPROVED PHOTOIMAGING SYSTEMS WITH CYCLIC HYDRAZIDES ABSTRACT OF THE INVENTION A photosensitive system comprising in intimate admixture (1) a dye in its leuco form, (2) a photooxidant taken from the group of hexaarylbiimidazole compounds, benzophenone, para-aminophenyl ketones, polynuclear quinones and thioxanthenones, and mixtures thereof and in the presence of the admixture is a 5-member-heterocyclic phenylhydrazide compound. The cyclic phenylhydrazide can be present in the admixture, or a dry coating of the admixture, after imagewise exposure, is treated with a solution of the heterocyclic compound. The system is useful in formation of colored images. PD 1712

351382

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