DYEING PROCEDURE
FOR WOOL
Method I
This is recommended
for Acid Levelling Dyes:
|
X% |
Dye |
|
5 - 10% |
Glauber's Salt
Calc.
|
|
2 - 5% |
Sulphuric Acid
(168oTW)
or
Formic Acid (85%) |
Enter the material (without dye) at 50oC and run for 5
minutes. Add the dissolved dye and raise the temperature gradually
to the boil over 30 minutes and continue dyeing at the boil for
45-60 minutes. Rinse.
Method II
This is recommended
for TANACID Milling & TPM Dyes:
|
X% |
Dye |
|
5% |
Glauber's Salt
Calc. |
|
1 - 3% |
Acetic Acid
(30%)
or
Ammonium Sulphate
or
Ammonium Acetate |
Enter the material (without dye) at 50oC and run for
about 5 minutes. Then Add the well dissolved dyestuff and dye for 15
minutes. Raise the temperature gradually to the boil over 30 minutes
and continue at the boil for 45-60 minutes. For heavy shades, if
exhaustion is not completed, add:
|
2 - 4%
|
Acetic Acid (30%)
or
Formic Acid (85%)
or
|
|
1 - 2% |
Sulphuric Acid
(168oTW) |
and dye for further 15-30 minutes
at the boil. Rinse.
Method III
This
is specifically recommended for TANACID Navy Blue 2RNS:-
|
X% |
Dye |
|
5% |
Glauber's Salt
Calc. |
|
1 - 3% |
Acetic Acid
(30%)
or
Ammonium Sulphate
|
|
0.2 - 0.5% |
Sodium or
Potassium Dichromate |
Enter the yarn (without dye) at
40oC for about 5 minutes. Then add the dissolved dye and
raise the temperature gradually to the boil over 45 minutes and dye
further for 60 minutes at the boil. Rinse.
Method IV
This method is recommended for TANACID
1:1 Metal Complex Dyes.
|
X% |
Dye |
|
5 - 10% |
Glauber's Salt Calc.
|
Enter the material for 10-15 minutes. Add 4% Sulphuric Acid (l68oTw)
and raise the temperature gradually to the boil. In case of medium
or deep Shades add a further quantity of 2 - 4% Sulphuric Acid
(l68oTw) to the dyebath and continue dyeing at the boil. The total
time of the boiling period should be at least 90 minutes. Rinse well
to free all acid and preferably neutralise all traces of acid on the
yarn with 2 cc/litre Ammonia (25%).
1:1 Metal Complex Black WA repuires a modified method as under:-
|
X% |
Dyestuff |
|
2% |
Sulphuric Acid
(168oTW) |
Enter the material at 70oC
and raise the temperature to the boil. After boiling for a short
time add a further quantity of 3% Sulphuric Acid (l68oTw)
to the dyebath and continue dyeing at the boil. The total time of
boiling should be atleast 90 minutes. An addition of 0.3% Sodium or
Potassium Dichromate, 30 minutes before dyeing is completed,
contributes to enhanced depth of shade, producing a fuller black.
Finally rinse well and neutralise all traces of acid on the yarn
with a little Ammonia as mentioned for other 1:1 Metal Complex dyes.
Method V
This
method is recommended for the dyeing of Chrome Dyes:
|
X% |
Dyestuff |
|
4% |
Chromate
Mordant (prepared by mixing one part Sodium or Potassium
chromate and two parts of Ammonium Sulphate) |
Enter the material at 50oC
and raise the temperature to boil within 45 minutes. Then continue
further at the boil for 60-90 minutes. When dyeing medium to heavy
shades add for exhaustion:
|
0.5-1.0%
|
Acetic Acid (30%)
or |
|
0.25 - 0.5% |
Formic Acid |
Method VI
This method is recommended for the dyeing of TANACID 1:2 Metal
Complex Dyes:
The dyeing method is similar to method 1 employing,
|
2 - 3%
|
Ammonium Sulphate
or
Ammonium Acetete |
No extra addition of Acetic Acid is
normally necessary.
Fastness Properties
|
Light Fastness : |
The rating figures are given on the scale 1-8 i.e. 1 (minimum)
poor and 8 (maximum) outstanding. |
|
Other Fastness : |
The rating figures are given on the scale 1-5 i.e. I (minimum)
poor and 5 (maximum) outstanding. |
|
