Development material and process for the production of a negative colour proof, and process for the production of both a positive and negative colour proof on a single image-receiving material.

摘要

The invention relates to a development material by means of which a latent, coloured image obtained by laminating another, photopolymerizable material colored in a primary colour onto an image-receiving material, peeling-off the film support and exposing the material under the associated negative colour separation film (alternatively, in another embodiment, the film support can be removed only after the exposure), can be developed by laminating this development material onto the latent image and then peeling-off the development material together with the non-image areas, and to a process for the production of a colour proof using this development material in combination with photopolymerizable materials in the various primary colours. The photopolymerizable material mentioned is suitable, in a certain embodiment, for producing colour proofs from positive film masters, which is described, inter alia, in US-A 4,895,787, US-A 5,049,476 and EP Application No. 96 201 083.1. In combination with the novel development material, it is now possible, using precisely this photopolymerizable material, also to produce colour proofs from negative film masters. By using a suitable procedure, this system even makes it possible to employ and process negative and positive film masters simultaneously on a receiving material, it not being necessary for the emission spectrum of the light source to be varied during production of the colour proofs.