Composite developer-etch composition for chromium-plated lithogr

Details Composite developer-etch composition for chromium-plated lithogr Composite developer-etch composition for chromium-plated lithogr

1975-04-14

1977-05-10

Kimlin, Edward C.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 36, 96 363, 96 48R, 156659, 156654, 252 791, G03F 702, G03C 500

Patent

active

040226190

ABSTRACT:
A composite developer-etch composition for chromium-plated lithographic printing plates comprises an aqueous solution of aluminum chloride, a water-soluble chloride other than aluminum chloride, phosphoric acid, and an acid-stable water-soluble reducing agent; the composition having a particular specific gravity range.

REFERENCES:
patent: 2599914 (1952-06-01), Hartsuch et al.
patent: 3625687 (1971-12-01), Dunkle
patent: 3747525 (1973-07-01), Maffet et al.
patent: 3865595 (1975-02-01), Watkinson

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