Method for verifying silver-based lithographic printing plates

Details Method for verifying silver-based lithographic printing plates Method for verifying silver-based lithographic printing plates

1998-05-26

2000-12-12

Font, Frank G.

Optics: measuring and testing

By shade or color

356422, G01J 346

Patent

active

061606243

ABSTRACT:
A method is disclosed for verifying the printing quality of a lithographic printing plate which is obtained by a plate-making process whereby an ink-receptive silver image is formed at the printing areas, characterized in that said method comprises the step of matching the color of the silver image of said plate with a plurality of reference colors contained in a color reference system that provides information regarding the quality of silver-based lithographic printing plates having said reference colors. The color reference system may also provide information regarding the parameter(s) of the plate-making process so that said parameter(s) can be adjusted in order to improve the quality of the plates obtained by said process.

REFERENCES:
patent: 5015098 (1991-05-01), Berg et al.
patent: 5283157 (1994-02-01), Davies
patent: 5578824 (1996-11-01), Koguchi et al.
Patent Abstracts of Japan, vol. 012, No. 354 (P-761), Sep. 22, 1988, and JP 63 106660 A (Mitsubishi Paper Mills Ltd), May 11, 1988.

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