The document discusses wet processing in the textile industry. Wet processing includes bleaching, dyeing, printing, and finishing processes. There are three main types of wet processing: 1) Preparation processes like scouring and bleaching ensure the textile has properties for coloring or finishing. 2) Coloration processes like dyeing and printing add color for aesthetic or functional purposes. 3) Finishing processes provide properties demanded by the end use, such as water repellency or flame retardancy, and occur last to enhance fiber properties. Wet processing transforms raw fibers into a finished textile product.
2. What is wet processing:
The textile wet processing sector of the textile industry
exist in order to carry out all the processes on the textile
that involve some form of wet treatment.
It include the process such as
Bleaching
Dyeing
Printing
Finishing
3. Functions of wet processing
Three type of process involve in textile wet processing
Preparation process Exist to ensure that the
textile has the right physical and chemical properties to
enable it to be colored or finish.
For example
Scouring
Bleaching
Heat setting etc.
4. Functions of wet processing
Preparation process :
Textiles are often in vary impure state when arrived at the
coloration stage like a woven fabric still contain a great
deal of impurities when arrives at dyeing or printing
stage. These impurities must be removed before dyeing
and printing otherwise they spoil the coloration process
and appearance of textile.
Man made fibers also will need to be cleaned up in some
cases.
5. Functions of wet processing
Coloration process Exist to provide the textile with
color either for aesthetic reasons or for some functional purpose
determined by the end use of the product.
The process by which the textile materials are coloured by
different types of dye or pigments, related chemicals required
water is called dyeing. Localized application of dyestuff or
pigments on fabric according to the predetermined design is
called printing.
For example
Dyeing
Printing
6. Functions of wet processing
Coloration process: we no only color textiles in order to
make them more attractive but also for some important
purposes like printing of military uniform for camouflage
purpose not for aesthetic purpose.
7. Functions of wet processing
Finishing process Exist to provide the textile
with the properties that the end use demands and which
have not already been provided by any earlier process.
For example
Water repellency
Antimicrobial
flame retardancy etc.
8. Function of wet processing
Finishing process: As the name suggest finishing
processes comes at the end of a series of processes
typically right at the end of the whole processing
sequence of textile. When textile reaches the finishing
stage, the process have gone before may have impaired
or even destroyed some of the properties of the fiber that
it would be desirable to have retained in the final product.
The finishing process is carried out to re-introduced the
properties or to increase them.
9. The processing of textile from the original
loose raw fiber to the final product it is helpful
to understand when processes could occur.
