Etch bleaching process

Details Etch bleaching process Etch bleaching process

1973-01-26

1977-08-30

Klein, David

Gas separation: apparatus

Electric field separation apparatus

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

96 29L, G03F 702, G03C 554

Patent

active

040452220

ABSTRACT:
In an etch-bleaching process wherein a hydrophilic layer in/on which a silver image exists is first treated with an etch-bleaching solution the improvement where the hydrophilic layer is subsequently treated with an aqueous solution containing at least one of an oxyacid of chlorine and a salt thereof.

REFERENCES:
patent: 2494053 (1950-01-01), Mitson et al.
patent: 3551150 (1970-12-01), Woodward et al.
patent: 3620737 (1971-11-01), Etter et al.
patent: 3625687 (1971-12-01), Dunkle

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