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US 2009/0291395 A1Published application
Methods for imaging and processing positive-working imageable elements
AssigneeEastman Kodak Company
InventorsCelin Savariar-Hauck, Rene Ullrich, Manuel Klamt
Life of this patent
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Abstract
An imaged and developed element, such as a lithographic printing plate, is provided by infrared radiation imaging of a positive-working imagable element having inner and outer imagable layers. One or both layers contain a polymeric binder having pendant 1H-tetrazole groups. The imaged element is developed with a single processing solution having a pH of from about 5 to about 11 to remove predominantly only the exposed regions and to provide a protective layer over the imaged surface.
Claims18
A method of making an image comprising:
- A) using a laser providing infrared radiation, imagewise exposing a positive-working imagable element comprising a substrate having thereon, in order, an inner imagable layer and an outer imagable layer, to provide exposed and non-exposed regions,
- wherein either or both of said inner and outer imagable layers comprise a polymeric binder that has a backbone and pendant 1H-tetrazole groups attached to said backbone, and
- B) applying a single processing solution having a pH of from about 5 to about 11 to said imaged element both:
- (1) to remove predominantly only said exposed regions, and (2) to provide a protective coating over all of said non-exposed and exposed regions of the resulting lithographic printing plate.
1 more element
A method of lithographic printing comprising:
- A) using a laser providing infrared radiation, imagewise exposing a positive-working imagable element comprising a substrate having thereon, in order, an inner imagable layer and an outer imagable layer, to provide exposed and non-exposed regions,
- wherein either or both of said inner and outer imagable layers comprise a polymeric binder that has a backbone and pendant 1H-tetrazole groups attached to said backbone,
- B) applying a single processing solution having a pH of from about 5 to about 11 to said imaged element both:
- (1) to remove predominantly only said exposed regions, and (2) to provide a protective coating over all of said non-exposed and exposed regions of the resulting lithographic printing plate,
- C) removing excess single processing solution from said lithographic printing plate, and optionally drying said lithographic printing plate, and
- D) without removing said protective coating, using said lithographic printing plate for printing an image using a lithographic printing ink.
3 more elements
Dependencies are inferred from the claim text.