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

1976-06-14

1977-09-20

Kimlin, Edward C.

Gas separation: apparatus

Electric field separation apparatus

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

96 33, 96 48R, 252 791, G03C 500, G03C 524

Patent

active

040494535

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: 3019106 (1962-01-01), Adams
patent: 3625687 (1971-12-01), Dunkle
patent: 3639185 (1972-02-01), Colom
patent: 3698904 (1972-10-01), Fukui et al.
patent: 3747525 (1973-07-01), Maffet et al.
patent: 3865595 (1975-02-01), Watkinson

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