Aluminum printing plates and method of making
AssigneePrinting Developments, Inc.
InventorsJeffrey G. Zaloom, Bruce Holman, III, Zhengzhe Song, David C. Tanck
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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.
Claims10
A method of preparing aluminum printing plates comprising the following steps in sequence:
- a) graining the aluminum;
- b) de-smutting the aluminum;
- c) rinsing with hot water;
- d) acetating the aluminum;
- and
- e) silicating the aluminum.
Dependencies are inferred from the claim text.