Method for copying a printing plate for humid offset printing

Details Method for copying a printing plate for humid offset printing Method for copying a printing plate for humid offset printing

2006-08-15

2006-08-15

Colilla, Daniel J. (Department: 2854)

Printing

Planographic

Lithographic plate making, and processes of making or using...

C101S465000, C101S466000

Reexamination Certificate

active

07089857

ABSTRACT:
The present invention concerns an original method of copying a printing plate. Said plate, intended for wet offset printing, comprises a base substrate and a photosensitive layer which is soluble in a solvent.As is conventional, said method comprises selectively eliminating said photosensitive layer at suitable locations and is characterized in that said selective elimination comprises: depositing droplets of said solvent at said suitable locations; and rinsing the plate to evacuate the deposited solvent, which by then is charged with the photosensitive layer eliminated from said locations and is inactive.

REFERENCES:
patent: 5655446 (1997-08-01), Watanabe
patent: 6315916 (2001-11-01), Deutsch et al.
patent: 2001/0050702 (2001-12-01), Nakazawa et al.
patent: 2003/0085972 (2003-05-01), Schaschek et al.
patent: 10119230 (1998-05-01), None

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