Process for forming patternwise coated powder layer

Details Process for forming patternwise coated powder layer Process for forming patternwise coated powder layer

1979-08-03

1981-05-26

Lawrence, Evan K.

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

Using specified radiation-sensitive composition other than a...

430144, 430291, G03C 534

Patent

active

042699185

ABSTRACT:
A strongly fixed patternwise coated powder layer is formed on a substrate by subjecting a thin layer of photo-sensitive composition containing an aromatic diazonium salt as a photo-sensitive component capable of becoming sticky due to the formation of a photolytic reaction product of the salt by a patternwise light exposure, thereby making the light-exposed part of the thin layer sticky, bringing the thin layer in contact with powdery grains, thereby forming a powder-containing coating layer, and contacting the powder-containing coating layer with a powdery material that reacts with the photolytic product, thereby forming a water-insoluble or slightly water-soluble solid material to fix the powdery grains to the substrate.

REFERENCES:
patent: 2854348 (1958-09-01), Bowerman
patent: 3472672 (1969-10-01), Prazak et al.

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