Flow
Chart of Wet Process Technology
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:
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:
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.
