In which way grey fabric is dyed is called wet process technology. Normally wet processing depends on buyer's demand. Suppose your buyer wants the more precised dyed fabric; so in this fact you should mercerize your fabric during the dyeing per-treatment process. Basically if the buyer don’t want that so called particular fabric there is no need to mercerize your fabric .Flow chart of Wet processing technology is given below:
Grey Fabric Inspection
↓
Sewing or Stitching
↓
Brushing
↓
Croping
↓
Singeing
↓
Desizing
↓
Scouring
↓
Bleaching
↓
Mercerizing
↓
Dyeing
↓
Printing
↓
Finishing
↓
Final Inspection
↓
Delivery
Grey Fabric 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:
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:
Brushing:
To remove the dirt, dust, loose fibre & loose ends of the warp & weft threads is known as brushing.
Shearing / Cropping:
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:
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:
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:
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:
Souring:
The process by which the alkali are removed from the scoured fabric with dilute acid solution is known as souring.
Bleaching:
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.
Mercerizing:
bleaching. It is done by bleaching agent.
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).
Dyeing :
Dyeing :
A process of coloring fibers, yarns, or fabrics with either natural or synthetic dyes.
Printing:
Printing:
A process for producing a pattern on yarns, warp, fabric, or carpet by any of a large number of printing methods. The color or other treating material, usually in the form of a paste, is deposited onto the fabric which is then usually treated with steam, heat, or chemicals for fixation.
Then finishing treatment are done according to buyer requirements and then folding, packaging, and at last delivery.
Then finishing treatment are done according to buyer requirements and then folding, packaging, and at last delivery.
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