US 5,627,009 A · Process for the production of a multicolored image

Abstract

The invention relates to a photosensitive material for the production of color proofing films for multicolor printing comprising: A) a transparent, flexible film support, B) a photopolymerizable layer containing: B1) a polymeric binder, B2) a free radical-polymerizable compound, B3) a compound which is capable of initiating the polymerization of (B2) on exposure to actinic light, and B4) a dye or colored pigment in a primary color of multicolor printing, and C) a thermoplastic adhesive layer on the photosensitive layer, which contains at least about 1.5% by weight of a water-soluble, colorless, low-molecular-weight salt whose aqueous solution is not highly acidic. The material is processed by lamination onto an image-receiving material, exposure and peeling apart of the film support and the image-receiving material, the unexposed areas of the layer and the adhesive layer remaining on the image-receiving material. The addition of the salt to the adhesive layer substantially reduces the adhesion between this layer and the exposed areas of the photopolymerizable layer.

Claims15

Dependent claims

A process for the production of a multicolored image, which comprises:

(1) laminating a photosensitive material under pressure onto an image-receiving material, wherein the photosensitive material comprises:
(A) a transparent, flexible film support,
(B) a photopolymerizable layer comprising:
(B1) a polymeric binder,
(B2) a free radical-polymerizable compound,
(B3) a compound which is capable of initiating the polymerization of (B2) on exposure to actinic light, and
(B4) a dye or colored pigment in a primary color of multicolor printing, and
(C) a thermoplastic adhesive layer on the photopolymerizable layer, wherein the adhesive layer (C) comprises at least about 1.5% by weight of a water soluble, colorless, low molecular weight salt whose aqueous solution has a pH of above about 3,
(2) exposing the photosensitive material imagewise through the film support with a color separation,
(3) peeling the film support together with the exposed areas off from the image-receiving material to produce a first positive image in a primary color, and
(4) repeating the steps (1)-(3) with at least one further color separation, the exposure being carried out in register with the first primary-color image on the image-receiving material.

8 more elements

Dependencies are inferred from the claim text.

Process for the production of a multicolored image

Life of this patent

Process for the production of a multicolored image

Life of this patent

Abstract

Claims15