Method of producing planographic printing plate su

专利名称：Method of producing planographic printing

plate support

发明人：Hirokazu Sawada,Tsutomu Kakei,Masaya

Matsuki,Akio Uesugi

申请号：US08/089562申请日：19930712公开号：US05350010A公开日：19940927

摘要：A method of producing a planographic printing plate support in which afteraluminum is continuously cast directly from molten aluminum into a thin aluminum plate,the aluminum thin plate is subjected to cold rolling, heat treatment and flattening toobtain an aluminum support. The aluminum support is then subjected to surfacetoughening. The components of the aluminum support are

Fe: 0.4%-0.2%,

< P>Si: 0.20%-0.05%,

Cu: not larger than 0.02%, and the Al purity is not smaller than 99.5%. After

continuous casting, Fe in a range of from 20% to 90% of the Fe total content exists in agrain boundary and the rest of Fe exists as a solid solution in grains. In this case, it ispreferable that in a section perpendicular to the direction of continuous casting, the grainsize is in a range of from 2 &mgr;m to 500 &mgr;m.

申请人：FUJI PHOTO FILM CO., LTD.

代理机构：Sughrue, Mion, Zinn, Macpeak & Seas

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