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US 6,548,215 B2Granted
Method for the production of a printing plate using the dual-feed technology
AssigneeKodak Polychrome Graphics LLC
InventorsMathias Jarek, Dietmar Frank
Life of this patent
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Abstract
A method for producing printing plate precursors by dual-feed technology is described. The obtained printing plate precursors contain polymer particles in the photosensitive layer and show high print run stability.
Claims17
Method for producing a printing plate precursor comprising:
- (a) providing a first solution comprising a thermoplastic polymer and a solvent or solvent mixture A, solvent A being capable of dissolving the thermoplastic polymer, the thermoplastic polymer being soluble in organic media but insoluble in alkaline media, and a conventional photosensitive composition;
- (b) separately providing a second solution comprising a solvent B which is capable of dissolving a photosensitive composition but not the thermoplastic polymer and which is less volatile than solvent A;
- (c) separately feeding the solutions of steps (a) and (b) above to an in-line mixer unit;
- and
- (d) applying mixture from the mixer unit to a printing plate substrate thereby forming a coating on the substrate,
- wherein a conventional positive or negative working, or electrophotographically working photosensitive composition C is present in at least one selected from the first solution and the second solution.
3 more elements
Dependencies are inferred from the claim text.