Aluminum support for lithographic printing plate

Details Aluminum support for lithographic printing plate Aluminum support for lithographic printing plate

1997-07-03

1998-11-10

Funk, Stephen R.

Printing

Planographic

Lithographic printing plates

205127, 205214, 205324, 428687, B41N 108, C25D 1104

Patent

active

058328343

ABSTRACT:
An aluminum support for a lithographic printing plate used in off-set printing or the like is disclosed, having a surface shape determined using an atomic force microscope (AFM) such that when measured within the measurement range of 100 .mu.m square with the resolution in the horizontal (X, Y) direction being 0.1 .mu.m, assuming that the surface area obtained by an approximate three-point problem is .alpha. and the upper projected area is .beta., the .alpha./.beta. value (specific surface area) is from 1.15 to 1.5, and when measured within the measurement range of 240 .mu.m square with the resolution in the horizontal (X, Y) direction being 1.9 .mu.m, the average surface roughness is from 0.35 to 1.0 .mu.m and the ratio of the sum of the surface area where the gradient of 30.degree. or more to the total surface area is from 5 to 40%.

REFERENCES:
Patent Abstracts of Japan, vol. 096, No. 007, Jul. 31, 1996 & JP 08058256 A (Mitsubishi Chem. Corp.; Konica Corp.) *abstract*.

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