HEAT-SENSITIVE COMPOSITION IN WHICH REMOVAL OF THE UNEXPOSEDREGIONS IS UNNECESSARY, NEGATIVE LITHOGRAPHIC PLATE COATED WITH THE SAID COMPOSITION AND METHOD FOR FORMING A NEGATIVEIMAGE ON THE SAID PLATE

摘要

A heat-sensitive composition which forms an image without the removal of material, which does not require any developing treatment after the stage of exposure to heat and comprises: (a) a switchable polymer, (b) an IR absorber, (c) a triazine compound, and (d) a novolak resin. Negative lithographic plate comprising a substrate coated with the said composition. A method for obtaining a negative image on a substrate coated with a composition which is first hydrophilic and then lipophilic after exposure to heat, without the removal of material, the said negative image being obtained by applying a small quantity of energy to the said composition.