To provide a method for manufacturing an aluminum substrate for a lithographic printing plate considerably reducing the produced amount of CO2 leading to global warming by obtaining the aluminum substrate for the lithographic printing plate meeting the quality of aluminum purity and trace metal content with high yield while reducing the amount of by-produced aluminum oxide when recycling the used lithographic printing plate.
The method for manufacturing the aluminum substrate for the lithographic printing plate includes preparing a reclaiming material for the aluminum substrate including the used lithographic printing plate having an image recording layer containing a vinyl copolymer with acrylonitrile as a copolymerization component, on a support body for the lithographic printing plate with roughening treatment and anodization treatment sequentially applied to the aluminum substrate, obtaining reclaimed base metal from the reclaiming material, and adding a required amount of new aluminum base metal and trace metal base alloy containing Cu, to the reclaimed base metal to manufacture a new aluminum substrate.
OSADA MASAKAZU
Kato Kazunori
Hiroshi Fukuda