Process for the preparation of support sheet for photographic pr

Details Process for the preparation of support sheet for photographic pr Process for the preparation of support sheet for photographic pr

1989-12-14

1991-10-08

Pianalto, Bernard

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427 38, 427 41, 427209, 427223, 427322, 427340, 428342, 428512, 430532, 430539, 430937, B05D 306

Patent

active

050553208

ABSTRACT:
A support sheet for photographic printing paper having an undercoat layer on which a photographic emulsion layer is to be formed, and which is free from foaming, contamination by foreign substances, and putrefaction and does not effect the photographic emulsion, by the steps of coating front and back surfaces of a substrate sheet with polyolefin resins; surface-activating the front coating layer; and extrusion coating the activated surface of the front coating layer with a coating liquid comprising gelatin, through a slit-shaped orifice, to form the undercoat layer.

REFERENCES:
patent: 4451497 (1984-05-01), Dolezalek

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