Lithographic printing plate comprising a porous non-anodic layer
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United States of America Patent
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Nov 4, 2014
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app pub date -
Oct 3, 2005
filing date -
Oct 1, 2004
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Abstract
A printing plate comprises a substantially planar substrate, a porous non-anodic ungrained coating, having a thickness within the range of about 0.1 to about 30 microns and comprising at least one of metals, metal oxides and admixtures thereof, and an image recording layer, provided that where the porous coating consists essentially of oxide(s) only, it comprises at least one oxide of copper, magnesium, cadmium, aluminum, zirconium, hafnium, thorium, chromium, tungsten, molybdenum and (or) cobalt, and further provided that where the porous coating consists essentially of alumina only, it comprises specified pores. The invention also relates to an article of manufacture having a nanometric porous surface layer comprising at least one of metals, metal oxides and mixtures thereof, which comprises pores in the surface layer having a width in a range 0-100 nm, and wherein a major number of pores in this range have a width in a band of about 1 to about 30 nm.
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