E.i. Dupont De Nemours and Company

Other

Victor F Chu

James Riesenfeld

Process for formation of white opaque image in the toned areas of a photopolymer composition which comprises a leachable monomer, photoinitiator, organic polymer binder and optionally a plasticizer wherein the toned image areas are treated with a leaching solution, e.g., mixtures of organic solvents or mixtures of water and organic solvents; washing the treated areas, e.g., with water; and drying at a temperature up to 70.degree. C., e.g., with hot air dryer. The process is useful for the preparation of overlay exhibits and direct positive image for microfilm.

Opaque image formation in toned photopolymer layers using leaching

Process for preparation of multicolor images on a single negative-working photosensitive layer which comprises imagewise exposing the layer through a transparency to form tacky image areas; toning the tacky image areas with a toner which becomes swollen or solubilized upon contact with the tacky areas; buffing or rubbing the toned image areas until glossy; and repeating the exposing, toning and buffing or rubbing using a different image-bearing transparency and appropriate toner. The process is useful in preparing multicolor proofs, e.g., maps, textile and wall covering design proofs and samples, etc.

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Wilmington, DE, United States of America

Victor F Chu