Aluminum printing plates and method of making
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United States of America Patent
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Dec 16, 2003
Grant Date -
Nov 29, 2001
app pub date -
Jul 10, 2001
filing date -
Jun 19, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of making improved aluminum printing plates comprising graining the aluminum plates, de-smutting them by treating them with nitric acid solution, then rinsing with hot water, acetating the aluminum plates, and silicating the aluminum plates. The plates are then coated with a photoresist, pattern exposed and developed. The printing plates of the invention have improved characteristics; they have excellent adhesion of the resist in image areas, and ink repellency in non-image areas. The developed printing plates have excellent durability without baking.
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