Fuji Photo Film Company, Limited

Nippon Light Metal Company, Ltd.

Tadayuki Katoh

Kazushige Takizawa

Yasuhisa Nishikawa

Akira Shirai

Misako Kawasaki

An aluminum alloy support for lithographic printing plates produced by cold rolling an aluminum alloy composed substantially of Mg 0.05 to 3 wt %, Si 0.05 to 0.7 wt %, Zr 0.01 to 0.25 wt %, and Fe 0.05 to 0.4 wt %, with the balance being Al and impurities, and imparting a grained surface to the plate surface has high mechanical strength, good heat softening resistance, excellent water retentive property, and long press life.

Aluminum alloy support for lithographic printing plates

A support for lithographic printing plates is disclosed which comprises a plate of an aluminum alloy containing 0.02 to 0.20% by weight zirconium. The aluminum alloy causes no recrystallization phenomenon at temperatures below 320.degree. C. There is also disclosed a photosensitive lithographic printing plate comprising such a support with a photosensitive layer thereon.

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Shizuoka, Japan

Tadayuki Katoh