| Abstract |
This thesis aims to attract attention to the importance of using organic
wastes and residues as bio discharged-substances in discharge printing, which could be characterized as the ability to create delicate hues and intricate patterns of any depth with clarity and sharpness.
The cotton and wool fabrics were dyed with natural plant extracts,
namely, Psidium guava leaves, Ficus leaves, eggplant skin, and red cabbage leaves, which were extracted in water as a solvent. Then the dyed fabrics were printed by using discharge paste that contains oxidative enzymes such as polyphenol oxidase and peroxidase enzymes extracted from natural wastes such as potato peel, taro corms, and banana peel. These enzyme extracts were also
mixed with oxidative and reducing agents to investigate the effect of this mixture on the degree of whiteness. The effects of enzyme extract concentration, pH, drying temperature, drying time, and the effect of mixing the enzyme extracts with oxidizing agents
such as H2O2, brewer’s yeast, and a reducing agent such as glucose were studied. Color strength, enzyme activity, GC-MS analysis, total phenolic, particle size,and fastness properties were all evaluated. The physical and mechanical properties of printed materials were also assessed. |
