Method of providing lithographic printing plates
AssigneeEastman Kodak Company
InventorsMurray Figov, Moshe Marom, Ilan Levi
Life of this patent
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Abstract
Lithographic printing plates can be obtained by contacting infrared radiation-imaged negative-working lithographic printing plate precursors with a processing solution having a pH less than 9 and comprising a UV photoinitiator. After this processing, the lithographic printing plate is floodwise exposed with UV radiation. Providing a UV-photoinitiator in the processing solution followed by UV exposure can increase imaging sensitivity and printing plate run-length, and reduce print background.
Claims21
A method of providing a lithographic printing plate comprising:
- A) contacting an infrared radiation-imaged negative-working lithographic printing plate precursor with a processing solution having a pH less than 9 and comprising a UV photoinitiator, to provide a lithographic printing plate, and
- B) floodwise exposing said lithographic printing plate with UV radiation.
A method of providing a lithographic printing plate comprising:
- A) imagewise exposing a negative-working lithographic printing plate precursor to infrared radiation to provide exposed and non-exposed regions,
- B) contacting said exposed lithographic printing plate precursor with a processing solution having a pH less than 9 and comprising a UV photoinitiator, to provide a lithographic printing plate, and
- C) floodwise exposing said lithographic printing plate with UV radiation.
Dependencies are inferred from the claim text.