Photosensitive article for making visual aids with diazonium com

Radiation imagery chemistry: process – composition – or product th – Micrography – process – composition – or product other than...

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430157, 430175, 430176, 430280, 430292, 430293, 430294, G03C 154, G03C 160, G03C 178

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active

042998930

ABSTRACT:
Montage films, duplicating films, color guide films, microfiche film, color transparencies and similar visual aids are prepared from photosensitive articles having a layer of a photosensitive composition coated on a transparent support, preferably a flexible plastic transparent support.
The exposed articles are developable with water to form the visual aid. The photosensitive layer is formed from a composition which includes a photosensitive reaction product of a condensation product of a diazonium compound with an arylsulfonic acid, and an epoxy resin which is liquid at ambient temperatures. The diazonium compound is preferably a paradiazodiphenylamine and the preferred condensing agent is formaldehyde or paraformaldehyde.
The photosensitive layer can be colored with a permanent dye of a color depending on the type and use of the visual aid.
Best results, with regard to water-developability and mechanical strength, are provided by first coating the transparent support with an intermediate layer of an adhesive resin.

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