DYEING PROCEDURE
 Contd... from
Page 1
Modified Method of 1:1 Metal Complex Black WA :
|
Y% |
DYES |
|
2 %
|
Sulphric Acid (1680) |
Insert the
material at 700C and raise the temperature to boil. After boiling for
a short time add a further quantity of 3% Sulphuric Acid (l680) to
the dyebath and continue dyeing at the boil. The total time of boiling should be
at least for 90 Min. To get complete black add 0.3% Sodium or Potassium
Dichromate, for 30 minutes before dyeing is completed. At End, rinse well and
neutralize all traces of acid on the yarn with a little Ammonia as used for
other 1:1 Metal Complex dyes.
Modified
Method of 1:2 Metal Complex :
It is very similar to Leveling Dyeing. And there is no need to add any addition
of Acetic Acid.
|
2 %
To 3% |
Ammonium Sulphate or Ammonium Acetate |
Dyeing
System of Chrome Dyes :
|
Y% |
DYES |
|
4 %
|
Chromate Mordant (Mixing of One part Sodium or Potassium Chromate and two
Part of Ammonium Sulphate) |
Insert
Material at 500C and raise the temperature to boil in 45 Min.
Continue boiling for 60 to 90 Min. To get exhaustion, while dyeing standard is
to heavy shades :
0.25%
To 0.5%
|
Formic Acid
or |
|
0.5%
To 1% |
Acetic Acid (300) |
| 
