Abstract:
Raw denim fabric obtained after finishing is mostly impossible to wear before wash
because of the rigidity and stiffness of finished denim. Finished denim is also very dull
looking before wash. So, it is usually a must for denim to go through different washing
processes not only for changing the physical property but also for the change of
aesthetic property of denim. This project is done for comparing the physical properties
like EPI, PPI, weight and shrinkage% of denim fabric with different constructions after
Enzyme and Bleach wash. This is a survey-based project as no experiment is done to
complete this project. Different washing processes like Enzyme, Bleach, Stone washes
were observed and the visual change is seen. The information about the change in
physical properties like EPI, PPI, weight & shrinkage% were collected from the Details
Sheet provided by the QC section of Shasha Denims Ltd. After compiling and
comparing all the necessary data, it is seen that the increase in EPI averaging at 21.36%
is more drastic than the change in PPI averaging at 3.15% after both Enzyme and Bleach
wash. These two washes have similar impact on EPI, PPI, weight and shrinkage after
wash. Among the three shrinkage types, width shrinkage averaging at 15.76% is the
most extreme compared to length and skew shrinkage averaging at 2.66% and 0.86%
respectively after Enzyme and Bleach washes. This extreme width shrinkage is also the
reason behind the drastic increase of EPI after both Enzyme and Bleach Wash.
