Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making printing plates
Reexamination Certificate
2008-05-22
2011-12-27
Hamilton, Cynthia (Department: 1722)
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making printing plates
C101S451000, C101S457000, C430S944000
Reexamination Certificate
active
08084189
ABSTRACT:
A method of making imaged elements such as lithographic printing plates is achieved by imagewise exposing an infrared radiation-sensitive positive-working imageable element to provide exposed and non-exposed regions. The imaged element is developed using a single processing solution having a pH of from about 9 to about 11.5 and containing carbonate ion and at least 1 weight % of one or more anionic surfactants, to remove predominantly only the exposed regions to provide an image and to provide a protective coating on the imaged surface. The imageable element comprises a substrate and a radiation absorbing compound, and has an imageable layer on the substrate that comprises a developability-enhancing compound and a poly(vinyl acetal) in which at least 25 mol % of its recurring units comprise pendant nitro-substituted phenolic groups.
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U.S. Appl. No. 11/677,599, filed Feb. 22, 2007, titled Radiation-Sensitive Compositions and Elements With Basic Development Enhancers, by Moshe Levanon et al.
U.S. Appl. No. 11/769,766, filed Jun. 28, 2007, titled Radiation-Sensitive Compositions and Elements With Solvent Resistant Poly(Vinyl Acetal)s, by Levanon et al.
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U.S. Appl. No. 12/025,089, filed Feb. 4, 2008, titled Method of Imaging and Developing Positive-Working Imageable Elements by Levanon et al.
Levanon Moshe
Nakash Moshe
Eastman Kodak Company
Hamilton Cynthia
Tucker J. Lanny
LandOfFree
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