We tried to prepare multi direct plates that can be used to many kinds of image output sources. A stable mixture solution consisting of tetraisopropyl titanate, titanium acetyl acetonate and ethanol was applied to the as -rolled aluminum surface to form water repellent film. Then we treated the film by two processes. Process 1: the organic titanium complex coated film was heat treated at temperatures above one hundred degrees and immersed in fountain solution at room temperature. Process 2: the complex coated film was immersed in phosphoric acid solution at room temperature and immersed in fountain solution. As the result, wettability with water for both samples was improved. The hydrophilic film makes non image areas of multi direct plate. We suppose that the improvement of wettability was caused by change of surface structure, not by property change generated by the change of the surface chemical composition, from measurements of FTIR and XPS, and observation of AFM.
