الفهرس 
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Abstract
The main objective of the present work was to replace the hazard chemicals which are used in discharge printing with eco- friendly compounds such as yeast or enzyme, and to investigate the different factors affecting the printing on natural fabric colored with natural dyes via conventional and lor ecofriendly methods .
. The investigation falls into two chapters as follows:
1. Bio-discharge printing on natural fabrics usmg brewer’s yeast.
II. Eco- friendly discharge printing on natural fabric usmg Laccase enzyme.