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US6140014A Lithographic printing plate 失效
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Lithographic printing plate
摘要:
A precursor for a lithographic printing plate having an aluminum support subjected to at least two graining treatments and simultaneously satisfying the ranges shown by following (1), (2), and (3);1.5.ltoreq.R.sub.ms (10 to 100 .mu.m)/R.sub.ms (1 to 10 .mu.m).ltoreq.3.0(1)0.2.ltoreq.R.sub.ms (1 to 10 .mu.m).ltoreq.0.4 [.mu.m] (2)0.4.ltoreq.R.sub.ms (10 to 100 .mu.m).ltoreq.1.0 [.mu.m] (3)wherein the R.sub.ms is the square average surface roughness obtained by measuring the surface form of the support by the AFM, the R.sub.ms (1 to 10 .mu.m) is the value about the frequency space of from 1 to 10 .mu.m, and the R.sub.ms (10 to 100 .mu.m) is the value about the frequency space of from 10 to 100 .mu.m. The lithographic printing plate using the aluminum support has greatly improved various characteristics such as scumming, the printability, the printing impression, etc.
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