Pre-sensitized lithoprinting plate requiring no fountain solution

A pre-sensitized lithoprinting plate comprising a support having an oleophilic surface and having thereon a single coating layer consisting of a heterogeneous mixture of (1) a photosensitive material selected from an o-quinonediazide, an azide compound, a condensate of p-diazodiphenylamine with formaldehyde, a p-quinonediazide, polyvinyl cinnamate, polyvinyl cinnamilidene, poly(cinnamoyloxyethyl acrylate), poly(cinnamoyloxyethyl methacrylate), copolymers of said acrylates and methacrylates, or an unsaturated polyester comprising the condensation product of p-phenylene diacrylic acid with a polyhydric alcohol containing a cyclohexyl group, and (2) a silicone rubber selected from (a) a single package cold-setting silicone rubber comprising dimethylpolysiloxane chains terminated by acetyl, oxime, alkyl or amino groups which have been heatcured into a de-alcohol-type silicone rubber, a de-acetic acid-type silicone rubber, a de-oxime-type silicone rubber or a deamino-type silicone rubber, or (b) a heat-cured two package cold-setting silicone rubber consisting of an addition-type silicone rubber or a condensation-type silicone rubber, said two package cold-setting addition-type silicone rubber being formed by the reaction sequence:

• ##EQU17## or from the reaction sequence:
• ##EQU18## wherein R' is a monovalent alkyl group, a monovalent aryl group, a cyanoaryl group, and is the same or different group and A and B are organosiloxane residue groups;
• and wherein aid two package cold-setting condensation-type silicone rubber is formed by the reaction sequence:
• ##EQU19## wherein R' is a monovalent alkyl group, a monovalent aryl group, a cyanoaryl group, and is the same or different group, R is an alkyl group having 1 to 3 carbon atoms, and A and B are organosiloxane residue groups;
• the weight ratio of said photosensitive material to said silicone rubber is from 0.1 to 1.1, and wherein said coating has a thickness of about 1 to 10 microns.