METHOD FOR MANUFACTURING SUPPORT FOR PLANOGRAPHIC PRINTING PLATE, AND METHOD FOR RECYCLING PLANOGRAPHIC PRINTING PLATE

摘要

PROBLEM TO BE SOLVED: To remarkably reduce energy loss and yield loss while securing the quality assurance of aluminum purity and trace metal contents even when used planographic printing plates are reused.SOLUTION: A recycling material 40 with deposited substances removed therefrom is melted in a melting furnace 42 into a recycled molten metal 44. The analyzed result obtained by analyzing the recycled molten metal 44 is used to determine the mix proportions of the recycled molten metal 44, a fresh metal ingot, and a trace metal master alloy to be input into a pre-rolling melting furnace. The produced recycled molten metal 44 in the molten state is input into the pre-rolling melting furnace to be mixed with the fresh metal ingot and the trace metal master alloy.