Lithographic imaging and cleaning of printing members having boron ceramic layers
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United States of America Patent
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Jul 11, 2000
Grant Date -
N/A
app pub date -
Apr 16, 1999
filing date -
Apr 16, 1999
priority date (Note) -
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Abstract
Lithographic printing members have inorganic protective layers that may be applied by vacuum deposition. In a representative construction, a substrate and a first layer thereover have different affinities for ink and/or a liquid to which ink will not adhere; the first layer may, for example, be applied under vacuum and comprise a metal or a metallic inorganic layer. Onto this layer is deposited a material comprising, for example, a boron ceramic, and under conditions ensuring that oxygen is present at least at the interface between the boron ceramic and the first layer. The first layer may incorporate a surface layer of oxygen or may be an oxygen compound. The oxygen facilitates hydrolysis of the boron ceramic during the print 'make-ready' process.
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