Invention Grant
- Patent Title: Aluminum alloy plate for lithographic printing form and method for production thereof and lithographic printing form
- Patent Title (中): 用于平版印刷形式的铝合金板及其生产方法和平版印刷形式
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Application No.: US10500088Application Date: 2002-12-27
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Publication No.: US07306890B2Publication Date: 2007-12-11
- Inventor: Mitsuo Ishida , Keitarou Yamaguchi
- Applicant: Mitsuo Ishida , Keitarou Yamaguchi
- Applicant Address: JP Tokyo US CT Norwalk
- Assignee: Mitsubishi Aluminum Co., Ltd.,Kodak Polychrome Graphics LLC
- Current Assignee: Mitsubishi Aluminum Co., Ltd.,Kodak Polychrome Graphics LLC
- Current Assignee Address: JP Tokyo US CT Norwalk
- Agency: RatnerPrestia
- Priority: JP2001-401685 20011228
- International Application: PCT/JP02/13839 WO 20021227
- International Announcement: WO03/057934 WO 20030717
- Main IPC: G03F7/00
- IPC: G03F7/00 ; G03P7/004

Abstract:
The present invention provides an aluminum alloy plate for use as a lithographic printing plate having an improved uniformity of a surface roughened by electrolytic etching and wherein streaking does not occur, and a method for producing the same. The present invention is characterized in comprising, in wt %, Fe: 0.1 to 0.6%; Si: 0.02 to 0.2%; Cu: 0.001 to 0.02%; Zn: 0.01 to 0.1%; Mg: 0.005 to 0.1%; Ti: 0.001 to 0.05%, and the remainder Al and inevitable impurities, and an average value of the crystal particle size is 60 μm or less in a direction perpendicular to the rolling direction.
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