Method of forming a pressure sensitive image transfer sheet and

Details Method of forming a pressure sensitive image transfer sheet and Method of forming a pressure sensitive image transfer sheet and

1985-12-13

1987-02-03

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Imaged product

Multilayer

430 14, 430257, 430258, 430259, 430262, 430954, G03C 168, G03C 190, G03F 300

Patent

active

046408789

ABSTRACT:
There is described a photomechanical method for forming pressure sensitive transfer reproductions of color images, either single color or multicolor, upon a substrate involving the forming of a base coat protective layer on a substrate, applying one color ink layer on the base layer and a white ink overlayer on the one color ink layer. The surface of the white ink overlayer is powdered and a layer of photoresist composition is applied. The photoresist covered layered substrate is exposed to a light source through an image carrying photographic negative film to harden the photoresist at the imaged areas thereby forming a mask. Nonhardened photoresist composition areas along with their underlaying layers are removed using stepwise solvent development steps. The steps are repeated where different ink colors are to be applied to form a multicolored image. The final single color image or the final multicolor image, as the case may be, being thoroughly dried, finally coated with a pressure sensitive adhesive to form the image transfer sheet. Drying between each step of formation is essential.

REFERENCES:
patent: 3721557 (1973-03-01), Inoue
patent: 4268601 (1981-05-01), Namiki et al.
patent: 4282310 (1981-08-01), Edhlund

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