Abrasion development

Details Abrasion development Abrasion development

1984-10-29

1985-08-06

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Microcapsule, process, composition, or product

430403, 346201, G03C 168, G03C 524

Patent

active

045336156

ABSTRACT:
This invention relates to image developing apparatus and specifically a developer roll for use in combination with a color producing substrate. In accordance with this invention, a color is formed by the reaction of isolated chromogenic materials. A first chromogenic material is typically a color precursor of the electron donating type and is encapsulated with a photosensitive composition on the surface of an imaging sheet. The second chromogenic material is typically identified as a color developer and is generally of the electron accepting type. In this invention the active coating on the imaging sheet is abraded to rupture the capsules and promote the reaction of the color forming ingredients.

REFERENCES:
patent: 3700439 (1972-10-01), Phillips
patent: 4399209 (1983-08-01), Sanders
patent: 4440846 (1984-04-01), Sanders
patent: 4448516 (1984-05-01), Arney et al.

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