Method for the preparation of a lithographic printing plate material aluminum support for a lithographic printing plate material for aluminum support, and an image forming method lithographic printing plate material

摘要

Rough surface the same shape are obtained electrochemical graining plate width, the current density of the electrochemical graining treatment by the web transfer speed, the aluminum plate is also changed, the present invention is less lithographic manufacturing variations and provides a method for producing a printing plate material for the aluminum support, and the planographic printing plate material for the aluminum support with excellent printing durability in printing, stain resistance, the tone reproducibility, planographic printing plate material, and an image forming method I provide. The electrode configuration of the processing tank for performing electrochemical graining treatment, a method of manufacturing the lithographic printing plate material for aluminum support, is composed to 5 present at least three electrodes the number of 1φ using three-phase power , time to pass through the web transfer between the electrodes is from 0.15 to 0.60 seconds, and the ratio of the time that passes between the electrodes and the time for passing through the electrode directly below (electrode directly below / electrodes) and is characterized in that it is 1.5 to 3.5.