Method and apparatus an image-receiving element in diffusion tra

Details Method and apparatus an image-receiving element in diffusion tra Method and apparatus an image-receiving element in diffusion tra

1989-11-08

1992-05-12

Lusignan, Michael

Coating processes

With post-treatment of coating or coating material

Chemical agent applied to treat coating

427340, 427378, 427379, 430232, B05D 304

Patent

active

051126516

ABSTRACT:
A method of forming a silver image receiving element in diffusion transfer photography by hydrolyzing a surface of an alkali-impermeable polymer layer on a continuous running web so as to convert the polymer to an alkali-permeable polymer. The method includes the steps of first applying a liquid mixture of a hydrolyzing agent and a softening agent to the surface of the alkali-impermeable polymer layer, evaporating the softening agent in the liquid mixture by blowing air on the surface to form a concentrated layer of the hydrolyzing agent; and thereafter accelerating the occurrence of hydrolysis by blowing air on the surface so as to initiate hydrolysis reaction of the surface to as to convert the alkali-impermeable polymer layer to an alkali-permeable polymer layer. The temperature of the air which is blown on the surface is in the range of 50.degree. to 120.degree. C.

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Patent Abstracts of Japan, vol. 7, No. 266 (P-239) (1411), Nov. 26, 1983 & JPA-58-147737, Sep. 2, 1983.

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