Aluminum strip for lithographic printing plate carriers and the production thereof
AssigneeHydro Aluminium Deutschland GmbH
InventorsBernhard Kernig, Henk-Jan Brinkman, Jochen Hasenclever, Christoph Settele, Gerd Steinhoff
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Abstract
A method for producing aluminum strips for lithographic printing plate supports, wherein the aluminum strip is produced from a rolling ingot, which after optional homogenizing is hot-rolled to a thickness of 2 mm to 7 mm and cold-rolled to a final thickness of 0.15 mm to 0.5 mm provides for an aluminum strip having a thickness of 0.15 mm to 0.5 mm and a printing plate support produced from the aluminum strip.
Claims7
Aluminium strip for producing lithographic printing plate supports, having a thickness of 0.15 mm to 0.5 mm, characterised in that the aluminium strip consists of an aluminium alloy having the following alloying constituents in weight percent:
- 0.3%≦Fe≦0.4%,
- 0.2%≦Mg≦1.0%,
- 0.05%≦Si≦0.25%,
- Mn≦0.1%, optionally Mn≦0.05%,
- Cu≦0.04%,
- with the remainder Al and unavoidable impurities, individually max. 0.05%, in total max. 0.15%, and has a reversed bending fatigue strength transverse to the rolling direction of at least 2320 cycles in a hard-as-rolled state in a reversed bending test.
Dependencies are inferred from the claim text.