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- noun Plural form of
Sorry, no etymologies found.
Treated finished paper with ferric-oxide salts and with ferrocyanides insoluble in water but soluble in acids.
Soluble ferrocyanides, ferricyanides, and sulphocyanides of various metals, by forming dibasic salts with potassium, sodium, or ammonium, in conjunction with vegetable, animal, or metallic coloring matters.
If _iron_ is present it must be removed, since ferrous salts use up much cyanide, forming ferrocyanides, and ferric salts yield ferric hydrate, which obscures the end reaction.