Photosensitive diazo steel lithoplate structure

Details Photosensitive diazo steel lithoplate structure Photosensitive diazo steel lithoplate structure

1974-08-26

1976-05-25

Bowers, Jr., Charles L.

Gas separation: apparatus

Electric field separation apparatus

Plural diverse electric fields

96 33, 96 86P, 101456, 101458, 427431, 427433, 291962, 291965, G03F 708, G03C 194, G03C 152

Patent

active

039589943

ABSTRACT:
A lithographic printing plate structure and method of manufacture, in which a support sheet of steel, normally subject to corrosion in a lithographic environment, such as a mild steel, is coated, preferably on both sides, with aluminum, zinc or an aluminum-zinc alloy to a thickness of about 1 to 3 mils, a polyvinyl phosphonic acid is disposed on the metal coating and a negative working diazo photo-sensitive layer is applied over the polyvinyl phosphonic acid coating.

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patent: 3865595 (1975-02-01), Watkinson

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