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Application Of Direct Dyes
1. Recommended dyeing
1.1
| Acid dyestuff leveling agent |
0.5～1.5%
|
| Na2SO4 |
0～10%
|
| Ammonium sulfate or Acetate |
2～4%
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| Acetic acid 80% |
X%
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| Adjust PH 4-5， light color PH to 6.0 |
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1.2 Y% Dyes
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Note: Dyeing 30-60min in 98-100℃ (Dyeing time of salt depend on the dyeing depth); For the light color or difficult to dye, recommended keeping in 65-75℃ for 10-15min.
2. Post-processing and acidizing
Recommend add 1-2% formic acid in the last shower bath. Improving the wooi and the spinning performan.ce of scattered wool and woolen sliver. also the fabric’s heat water washing fastness and mouldproof .
3. Fixing
Usually less dosage of dyes are used in light and extra light color . so no need to fix color with good color fastness. But also accords to demands; in deep color, the technology and formula of fixation like below:
| Bath ratio |
1：10
|
| Dye•fixing agent |
1-2g/L
|
| Acetic acid |
0.5g/L
|
| PH |
4.5-5.0
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| Temperature • time |
70℃·20min
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For Reference only
Application Of Direct Dyes
1. Exhaust dyeing
1.1 Recipe of dyeing bath
| Dyeing method |
Weak Alkli
|
Neutral
|
| Dyestuff,%(owf) |
x
|
y
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| Na2CO3,g／L |
1～2
|
-
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| Na2SO4,g/L |
0～30
|
0～30
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1.2 Dyeing procedure
1.2.1 Common dyeing
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1.2.2 Dyeing bath with disperse dyes
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2. Padding
2.1 Recipe of padding tiquor
| Dyestuff |
X g/L
|
| Levelling agent |
20 g/L
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| Na3PO4 |
200 g/L
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| Other Additives |
20 g/L
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2.2 Procedure
Padding（Liquor pick-up 80%,Temp,60℃）→Steaming (Temp 100～103℃.Time.1-4min)→Rinsing→Fixing→Drying.
For Reference only
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