发明授权
- 专利标题: Coated dummy plates
- 专利标题(中): 涂层虚拟板
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申请号: US09126422申请日: 1998-07-30
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公开(公告)号: US06207287B1公开(公告)日: 2001-03-27
- 发明人: Cornelia Alba , Andreas Elsässer , Fritz-Feo Grabley , Klaus Jörg , Peter Lehmann
- 申请人: Cornelia Alba , Andreas Elsässer , Fritz-Feo Grabley , Klaus Jörg , Peter Lehmann
- 优先权: EP97202383 19970730
- 主分类号: B32B1504
- IPC分类号: B32B1504
摘要:
A dummy plate is provided for offset printing which essentially consists of a plate-, sheet- or band-form, mechanically and/or electro-chemically roughened, anodically oxidized and optionally hydrophilized aluminium support and a non-photosensitive, water-soluble protective layer applied thereto, characterized in that the layer contains a water-soluble organic compound which contains at least one OH- or NH-acidic group having a pKa value of ≦8 as acid or salt, and has a layer thickness which is smaller than the average roughness ra of the support material, determined by optical means. Even after extended storage at elevated temperature, the dummy plate can easily be used without an additional development step and exhibits no tendency to stick.