Aluminum alloy printing plate and method for manufacturing same
AssigneeFurukawa Aluminum Co., Ltd.
InventorChozo Fujikura
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Abstract
An aluminum alloy plate for printing is composed of 0.05-0.30% Mg, 0.05-0.30% Si, 0.15-0.30% Fe and the remainder Al and ordinary impurities. This printing plate is manufactured through the steps of subjecting an aluminum alloy ingot of this composition to a thermal soaking treatment; carrying out a hot rolling process; then carrying out a cold rolling process on the hot rolled alloy at least at a reduction of 70%; and carrying out low temperature annealing at a temperature of 150.degree.-250.degree. C. for at least one hour.
Claims3
An aluminum alloy printing plate comprising a printing plate of an aluminum alloy consisting essentially of 0.05-0.30% Mg, 0.05-0.30% Si, 0.15-0.30% Fe and the remainder Al and ordinary impurities said plate having a uniformed grained surface and a photosensitive layer thereon.
A method for producing an aluminum alloy printing plate comprising the steps of:
- subjecting an aluminum alloy consisting essentially of 0.05-0.30% Mg, 0.05-0.30% Si, 0.15-0.30% Fe and the remainder Al and ordinary impurities to a thermal soaking treatment,
- hot-rolling the thus-treated alloy,
- cold-rolling the hot-rolled alloy at a reduction of at least 70%,
- annealing the cold-rolled alloy at a temperature between 150.degree. to 250.degree. C. over a period of at least one hour, and
- roughening the surface of the resulting alloy so as to have a uniformly grained surface.
Dependencies are inferred from the claim text.