Dyeing Lab:
At first, dyeing is performed in the dyeing lab and then starting for bulk production. Dyeing lab work is called lab dip development. A lab dip is a swatch of fabric test dyed to hit a color standard. Lab dip plays an important role in the dyeing process. The bulk dyeing process completely depends on the lab dip. In the lab, a lab dip or sample is developed by the textile engineer or technician. Process flow chart of dyeing lab or lab dip development has given below.
Flow Chart of Dyeing Lab/Lab Dip Development
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Determination of the sample’s possible to color combination with the help of Spectrophotometer or manually
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Dispersion by autodoser
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Trial dyeing of the first recipe
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Unload
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Normal wash
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Hot wash with detergent
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Oven drying
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Ironing
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Shade matching in a lightbox ( If Ok then send to buyer for approval)
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If not ok
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The first correction takes from a Spectrophotometer or manually
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Dispersion by autodoser
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Trial dyeing of the first recipe
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Unload
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Normal wash
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Hot wash with detergent
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Oven drying
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Ironing
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Shade matching in a lightbox ( If Ok then send to buyer for approval)
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If not ok
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The second correction takes from Spectrophotometer or manually
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Dispersion by auto doser
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Trial dyeing of the first recipe
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Unload
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Normal wash
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Hot wash with detergent
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Finishing
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Hydro
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Drying
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Compare with a standard swatch
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If ok
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Send for buyer’s approval
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Bulk production by considering the buyer’s approved sample as standard
Concept of ‘Bulk to Lab’ dyeing
The dyeing laboratory has a great role in setting and achieving RFT. Basically, labs in dye-houses are used for generating lab recipes (usually called Lab Dip), color control, incoming raw materials quality control, in line and of line quality control, and so on. Generating a common recipe for dyeing is one of the objectives of the labs.
Author of this Article: Rana Sohel Executive Engineer Sunman Textile Mills Ltd. Chittagong Cell: +8801912-420118 Email: [email protected]