Patent ID: 6568325
Filing Date: 2003-05-27
Classification: B41N,Y10T

Abstract:
A support for a lithographic printing plate which is obtained by performing surface roughening treatment including electrochemical graining on an aluminum alloy plate containing 0.2-0.5 wt % of Fe, 0.04-0.20 wt % of Si, 0.005-0.040 wt % of Cu, 0.010-0.040 wt % of Ti, 0.001-0.020 wt % of Mg and 0.005-0.2 wt % of Ni, with the balance being Al and an incidental impurity, and which satisfies the following relation (1):[Ni]/10+[Ra]/100&lE;[Cu]â€ƒâ€ƒ(1) where [Ni] and [Cu] are the Ni and Cu contents (wt %), respectively, of said aluminum alloy plate, and [Ra] is the average surface roughness Ra (&mgr;m) of the roughened support surface.