METHOD FOR MAKING A LITHOGRAPHIC PRINTING PLATE SUPPORT
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United States of America Patent
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Issued Date -
Mar 3, 2011
app pub date -
Mar 7, 2008
filing date -
Mar 19, 2007
priority date (Note) -
Abandoned
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Abstract
A method for making a lithographic aluminum printing plate support comprising the steps of (i) graining said support by applying a charge density x; (ii) desmutting the grained support; (iii) graining the desmutted support by applying a charge density y; (iv) anodizing the support; characterized in that during each graining step a current density varying between 80 and 250 A/dm2 is applied and that the ratio x/x+y varies between 0.3 and 0.7.
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