Aluminum alloy blank for lithographic printing plate and support for lithographic printing plate
AssigneeFUJIFILM Corporation
InventorsHirokazu Sawada, Akio Uesugi
Life of this patent
Estimating the term…
Abstract
There is provided an aluminum alloy blank for a lithographic printing plate including iron in a range of 0.20 to 0.80 wt %; and the balance being aluminum, a crystal grain refining element, and unavoidable impurity elements. The unavoidable impurity elements may include silicon and copper, wherein a content of silicon is in a range of 0.02 to 0.30 wt % and a content of copper is equal to or below 0.05 wt %. A solid solution amount of silicon is in a range of 150 ppm to 1500 ppm.
Claims7
An aluminum alloy blank for a lithographic printing plate made of a continuously cast flat-rolled aluminum alloy plate, the aluminum alloy blank for a lithographic printing plate comprising:
- iron in a range of 0.20 to 0.80 wt %;
- and
- the balance being aluminum, up to 0.05 wt % of titanium and/or up to 0.02 wt % of boron as a crystal grain refining element, and unavoidable impurity elements,
- wherein, the unavoidable impurity elements comprise silicone and copper, a content of silicon is in a range of 0.02 to 0.30 wt %, and a content of copper is equal to or below 0.05 wt %, and
- a solid solution amount of silicon is in a range of 150 ppm to 1500 ppm and a solution amount of iron is in a range of 300 ppm to 1300 ppm.
Dependencies are inferred from the claim text.