Silver-free light-sensitive material

Details Silver-free light-sensitive material Silver-free light-sensitive material

1981-08-10

1982-11-23

Louie, Jr., Won H.

Radiation imagery chemistry: process, composition, or product th

Dye image from radiation sensitive dye or dye former by dry...

430337, 430344, 430339, G03C 152

Patent

active

043605877

ABSTRACT:
This invention relates to a radiation-sensitive, silver-free recording material for direct optical recording with high sensitivity, characterized by its exceptional resistance to light and heat and large solubility. This is achieved by the fact that the recording material contains as coloring substances, azo dyestuffs of the general formula ##STR1## R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 are the same or different and are halogen, alkoxy, alkyl, acetyl, amino; R.sub.8 hydroxy, alkoxy or acetylamino. The material distinguishes itself by the different processing variations that are possible so that with a same basic type, it is possible to obtain pictures operating according to a positive principle as well as according to a negative principle.

REFERENCES:
patent: 3620748 (1971-11-01), Fichter
Winslow et al.=Color Imaging System, International Publication No. WO 81/01757, PCT, pp. 1-44.

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