Diazotype material and graphic reproduction processes employing

Details Diazotype material and graphic reproduction processes employing Diazotype material and graphic reproduction processes employing

1975-03-10

1977-10-25

Herbert, Jr., Thomas J.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

8 41R, 96 91R, G03C 158

Patent

active

040554252

ABSTRACT:
A diazotype material, which comprises a supported light-sensitive layer comprising a light-sensitive, water-insoluble diazoimino compound of the formula: ##STR1## wherein R is an aryl group and R.sub.1 and R.sub.2 are organic radicals, which may be the same or different, or R.sub.1 and R.sub.2 together with the nitrogen atom to which they are attached form a heterocyclic group, an azo coupler, and an alkaline material, said diazoimino compound, when exposed to ultraviolet light, being reactive with said azo coupler to form a visible dye product only at a pH greater than 7. The diazotype material can be used for diazotype reproduction processes resulting in negative or direct positive images.

REFERENCES:
patent: 2618555 (1952-11-01), Reichel
patent: 2995465 (1961-08-01), Richey
patent: 2995466 (1961-08-01), Sorensen
patent: 3463638 (1969-08-01), Damm
patent: 3910794 (1975-10-01), Buisine et al.

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