Waterless planographic plates

Details Waterless planographic plates Waterless planographic plates

1993-11-02

1994-12-06

Lusignan, Michael

Coating processes

Nonuniform coating

Applying superposed diverse coatings or coating a coated base

101457, 101462, 427354, 430303, 525477, 525479, 528 18, 528 32, B05D 136, B05D 500

Patent

active

053709063

ABSTRACT:
The present invention features planographic plates fabricated with a silicone coating which produces economical and durable waterless plates when the coating is applied to imaged plates, cured and allowed to properly develop. Such a plate has a very high resolution and an excellent ink repellency in the non-print zones. The process of the invention applies the silicone coating directly onto a photo-imaged or a non-photo-imaged plate, curing the silicone, and then applying a solvent (developer) which penetrates through the silicone to the image. The imaging material is removed precisely, leaving a silicone stencil only in the desired, non-print areas. The silicone coating attaches chemically to the base metal (aluminum oxide), which produces a very durable coating.

REFERENCES:
patent: 3910187 (1975-10-01), Cords
patent: 4010687 (1977-03-01), Schanta et al.
patent: 4016814 (1977-04-01), Schanta et al.
patent: 4019437 (1977-04-01), Crystal
patent: 4634659 (1987-01-01), Esumi et al.

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