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DYEING PROCEDURE
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The
dyestuff is pasted with cold water dissolved by pouring 50
to 100 times its weight of boiling water with stirring.
Tanya exports Direct dyestuffs are dyed from a neutral or alkaline
dyebath depending on individual dyestuffs. The dyeings are
exhausted with the addition of Glaubers salt or common salt.
The quantities to be added are as follows:
For
Light Shades
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0.5%
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Soda Ash |
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5 - 10% |
Glauber's Salt Calc.
or
common salt. |
For Medium & Dark Shades
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1 - 2%
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Soda Ash |
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15 - 20% |
Glauber's Salt Calc.
or
common salt. |
The addition of soda ash to the dyebath may be omitted while
dyeing blends containing Acetate Rayon where the Acetate
component is to be reserved.
The dye-bath is set at 50 - 60oC with soda ash,
salt and dissolved dyestuff. The boild out yarn is then
entered and worked for 15 minutes. The dye-bath temperature
is raised to 90-95oC in 15 to 20 minutes. In
order to overcome unlevel dyeing, salt may be added after
about 15 minutes of initial dyeing.
For improving the fastness to washing of
Tanya
exports Direct
dyestuffs, we suggest an after treatment with dye fixing
agent. The dyed goods are treated in a fresh bath containing
2 to 3 gms/litre Dye fixing agent for 30 minutes at pH 6-6.5
at 45oC, The material is then rinsed and dried.
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The information and procedure provided here is in good
faith and to the best of our knowledge, but without liabilities.
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