Silk screen tactile prints and process

Details Silk screen tactile prints and process Silk screen tactile prints and process

B - Operations, Transporting

41

C

B41C 1/14 (2006.01) B41M 1/12 (2006.01) B41M 3/16 (2006.01) G09B 21/00 (2006.01) G09B 21/02 (2006.01)

Patent

CA 2072383

ABSTRACT Production of a tactile print using an improved silk screen process which provides a product with raised imprinted surfaces of sufficient local definition to permit tactile "reading" of the print. In the case of a surface imprinted with Braille patterns, the process provides a low cost touch-readable imprint of acceptable clarity and depth for use by Braille readers. The process uses known silk screen procedures using a screen ranging in mesh per square inch from 60 to 100, in combination with high viscosity "ink", which may in some instances be non-pigmented. The process includes the provision of underside spacers, and may also utilize air pressure differential across the thickness of the screen to facilitate flow of the "ink", together with controlled drying rates.

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