Dyeing is performed in the dyeing floor but before starting bulk production a lots of work is done in the dyeing laboratory. In the lab, lab dip or sample is developed by the textile engineer or technician. In lab, lab dip is matched with the sample given by the buyer. Then lab dip is send to the buyer for his approval. In lab, full work is done in sequence.
In a dyeing lab, lab dip is developed like the following sequence:
Receiving standard swatch
↓
First recipe take from Spectrophotometer or manually
↓
Dispersion by autodoser
↓
Trial dyeing of first recipe
↓
Unload
↓
Normal wash
↓
Hot wash with detergent
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Finishing
↓
Hydro
↓
Drying
↓
Compare with standard swatch
↓
If not ok
↓
First correction takes from Spectrophotometer or manually
↓
Dispersion by autodoser
↓
Trial dyeing of first recipe
↓
Unload
↓
Normal wash
↓
Hot wash with detergent
↓
Finishing
↓
Hydro
↓
Drying
↓
Compare with standard swatch
↓
If not ok
↓
Second correction takes from Spectrophotometer or manually
↓
Dispersion by auto doser
↓
Trial dyeing of first recipe
↓
Unload
↓
Normal wash
↓
Hot wash with detergent
↓
Finishing
↓
Hydro
↓
Drying
↓
Compare with standard swatch
↓
If ok
↓
Send for buyer’s approval
The flow chart which I have given in above is all most same in the entire dyeing laboratory. But this sequence could be changed depending on the engineers own procedure. This procedure is applicable for yarn or fabric dyeing.
In dyeing lab, the textile engineer should have deep knowledge about the shade matching.
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