Aluminum alloy plate for planographic printing plate
This invention relates to an aluminum alloy plate for A planographic printing plate which includes a lithographic printing plate, and more particularly to an aluminum alloy plate for a planographic printing plate which is used for a PS(presensitized) printing plate having a photosensitive layer prev...
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| Main Author | |
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| Format | Patent |
| Language | English |
| Published |
29.04.2003
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| Online Access | Get full text |
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| Summary: | This invention relates to an aluminum alloy plate for A planographic printing plate which includes a lithographic printing plate, and more particularly to an aluminum alloy plate for a planographic printing plate which is used for a PS(presensitized) printing plate having a photosensitive layer previously formed thereon and subjected to either a developing treatment or both the developing treatment and a printing treatment of the photosensitive layer.
An aluminum alloy plate for a planographic printing plate capable of being provided with a satisfactory roughed surface by electrolytic etching. The aluminum alloy plate contains 0.1 to 0.6% of Fe, 0.01 to 0.2% of Si, 5 to 150 ppm of Cu, and balance of Al and unavoidable impurities and has a surface layer portion formed of a metastable phase dispersion layer in which metastable phase AlFe-based intermetallic compound particles are dispersed. The metastable intermetallic compound particles each act as a starting point for pits. The alloy plate is formed with a roughed surface which is reduced in unetching and uniformly formed with pits, by electrolytic etching. |
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