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Abstract
With a view towards using biotechnology, as a clean technology, for improving the performance properties of pigment prints as well as avoiding any possible disadvantages without adversely affecting the environment, the original work presented in this thesis was designed to:
a) Evaluate the impact of enzymatic treatments on some performance properties of pigment prints, and. b) Enhance the printability of some cellubsic substrates via pre-
enzymatic treatments using cellulase enzymes. Given below a summary of and conclusions arrived from these studies.
I-ENZYMATIC TREATMENTS OF PIGMENT PRINTS
In order to enhance the performance properties of pigment- printed cellulosic, woven and knitted, substrates as well as to upgrade their quality taking in consideration both the economical and ecological aspects, this article focused on subsequent bio- polishing of pigment prints. Results obtained led to the following conclusions:
1- Nature of pigment, type of thickening agent, kind of binding agent as well as type and nature of the cellulosic substrate govern the depth of the obtained prints.
2- The extent of enzymatic is determined by the nature of the cellulase enzyme, i.e. Acid cellulases > Neural cellulase.
3. The percent loss in weight follows the descending order.
Acid- Cellulases > Acid- cellulases/ softener> Neutral-Cellulase>
None
4- The decrease in K/S value of the treated pigment prints follows the decreasing order:
None > Neutral cellulase > Acid- cellulases/ softener > Acid cellulases
5- The extent of improvement in softness degree follows the decreasing order: Acid-cellulases/ softener > Acid-cellulases > Neutral- cellulase >> None.
6- Enzymatic treatments have practically no effect on washing. perspiration as well as dry fastness properties of the printed substrates.
7- Enzymatic treatments have a slight positive impact on the wet- rubbing fastness properties on the treated pigment prints.