Process sequence of Wet processing Technology

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Grey fabric: Grey fabric is the term used for a fabric which is directly collected from weaving or knitting machine. The quality of grey fabric can effect from handle to the result of dyeing and printing.

Inspection: After manufacturing fabric it is inspected in an inspection Table. It is the process to remove neps, warp end breakage, weft end breakage, hole spot.

Stitching: To increase the length of the fabric for making suitable for processing is called stitching. It is done by plain sewing m/c.

Brushing: To remove the dirt, dust, loose fibre & loose ends of the warp & weft threads is known as brushing.

Shearing / Cropping: The process by which the attached ends of the warp & weft thread is removed by cutting by the knives or blades is called shearing. Shearing is done for cotton & cropping for jute. After Shearing or cropping fabrics goes under singeing process.

Singeing: The process by which the protruding / projecting fibres are removed from the fabrics by burning / heat to increase the smoothness of the fabric is called singeing. If required both sides of fabric are singed.

Desizing: The process by which the sizing mtls (starch) are removed from the fabric is known as desizing. This must be done before printing.

Scouring: The process by which the natural impurities (oil, wax, fat etc) & added/external/adventitious impurities (dirt, dust etc) are removed from the fabric is called scouring. It is done by strong NaOH.

Souring: The process by which the alkali are removed from the scoured fabric with dilute acid solution is known as souring.

Bleaching: The process by which the natural colours (nitrogenous substance) are removed from  the fabric to make the fabric pure & permanent white is known as Bleaching. It is done by bleaching agent.

Dyeing: See the previous post.

Printing: See the previous post.

Mercerizing: The process by which the cellulosic mtls/substance are treated with highly conc.NaOH  to impart some properties such as strength, absorbency capacity, lusture is known as mercerizing. It is optional. If the fabrics are 100% export oriented then it is done by highly conc. NaOH (48-52° Tw).

Finishing: See the previous post.

Flow chart of Wet Processing Technology