| 摘要 |
PCT No. PCT/GB96/02883 Sec. 371 Date Oct. 19, 1998 Sec. 102(e) Date Oct. 19, 1998 PCT Filed Nov. 21, 1996 PCT Pub. No. WO97/19819 PCT Pub. Date Jun. 5, 1997A method for preparing a substrate for a planographic printing plate is disclosed. A liquid that contains water; a soluble alkali metal silicate, preferably sodium silicate; and a dispersed particulate material is coated on a substrate, preferably aluminum or an aluminum alloy, to produce a hydrophilic layer on the substrate. A layer of image material may be coated over the substrate to produce a planographic printing plate. In one embodiment the liquid contains a mixture of two particulate materials: alumina and titanium dioxide.
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