The bark possesses tanning properties, and in Scotland in past times yielded with ferrous sulphate a black dye for wool.
ferrous sulphate forms double salts with the alkaline sulphates.
Black Russia leather is dyed with alum, extract of sanders, and ferrous sulphate.
This salt is also formed when ferrous sulphate is calcined with free exposure to the air.
Wool is mordanted with ferrous sulphate and tartar (3% of each) and dyed in a neutral bath.
The precipitating agent below may be ferrous sulphate, various sulphides, native metals, or organic matter.
The1028 quantity of ferrous sulphate consumed is now ascertained by again weighing the sample.
Calcination with ferrous sulphate converts all the copper sulphide into sulphate.
No pill made essentially of aloes and ferrous sulphate, said the government experts, could do these things.
When ferrous sulphate (copperas) is used then tartar is almost invariably used as the assistant mordant, oxalic acid only rarely.