Silk screen process

Details Silk screen process Silk screen process

1989-09-14

1991-05-14

Powers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

430 18, 430256, 430258, 430309, G03F 712

Patent

active

050155571

ABSTRACT:
A method for coating a printing screen with a sealer to avoid pinholing and damage to the screen from extended use. The method includes coating the inside of the screen with a photo emulsion, exposing the emulsion to the image to be printed, and etching out the exposed screen. Next, applying to the outside surface of the etched out screen a sheet of easy removable pressure sensitive vinyl, and next treating the etched out screen with a sealing composition, which provides a protective barrier for that part of the screen that prevents ink from printing. The sealing composition is advantageously a two part epoxy resin or an air-moisture curing urethane polymer.

REFERENCES:
patent: 4176602 (1979-12-01), Fedderson
patent: 4286518 (1981-09-01), Otthofer, Jr.
patent: 4499175 (1985-02-01), Curtis et al.

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