Support for lithographic printing plate and manufacturing method therefor, as well as original lithographic printing plate
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United States of America Patent
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Feb 16, 2016
Grant Date -
May 21, 2015
app pub date -
Jan 23, 2015
filing date -
Jul 27, 2012
priority date (Note) -
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Abstract
A lithographic printing plate support of the invention includes an aluminum plate and an anodized aluminum film which has micropores extending from a surface of the anodized film opposite from the aluminum plate in a depth direction of the anodized film; the micropores each have a large-diameter portion extending from the anodized film surface to an average depth (depth A) of 75 to 120 nm and a small-diameter portion which communicates with the bottom of the large-diameter portion; the average diameter of the large-diameter portion at the anodized film surface is at least 10 nm but less than 30 nm; a ratio of the depth A to the average diameter (depth A/average diameter) of the large-diameter portion is more than 4.0 but up to 12.0; and an average diameter of the small-diameter portion at the communication level is more than 0 but less than 10 nm.
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