After chroming, wash thoroughly to remove all traces of acid.
The chroming operation is carried out usually in drums or paddles.
In another process the "acid" type of chroming bath is used.
In another process the chroming bath is made up of 5½ per cent.
If therefore such quantities be used we have the so-called "Neutral type" of chroming bath.
They may also be tanned without depickling if the composition of the pickle be allowed for in the first chroming liquor.
The processes preparatory to chroming are very important, as it is essential to get the maximum yield of pelt.
After chroming them, neutralisation of the acid chrome salts is effected with borax, and the leather is ready for dressing.
Formyl Violet S4B, chroming after dyeing as described above.