R. Sudhakar

Dyeing and Color Fastness of Natural Dye from Psidium guajuva on Silk

Dyeing behavior of natural dye extracted from the leaves of Psidium guajuva L on silk fabric has been studied. Color values and color coordinates in terms of L*, a*, b*, C, and h were examined. A range of shades were obtained when dyed with different mordants and mordanting techniques. The extracted dye was tested for some of the ecoparameters using atomic absorption spectrophotometry and GC/MS. The test results were compared with the set standards to determine the ecofriendliness of natural dye. Their concentrations were found to be lower than the stipulated limits. Dyed samples were tested for antimicrobial activity against Gram-positive and Gram-negative bacteria. The dyed silk fabrics showed acceptable fastness properties and also were found to possess antibacterial activity.