The Isolation and Washed Fastness Testing of Crude Natural Dyes of Bagbagotot (Physllantus reticulatus) Berries from Vigan Ilocos Sur

Abstract

Bagbagotot (Phyllantug_reticulatys) berries were collected from Iligan, Ilocos Sur, then soaked in distilled water and concentrated in rotavapor at 40C. Water- soluble crude natural dyes were obtained through freeze-drying and yielded 9.20%. The fastness ofthe natural dye was tested. Ferrous sulfate, copper sulfate, alum and potassium dichromate were used as mordants applying in 2 different yarns, i.e., cotton and silk. Among all mordants in the 3 techniques namely post mordanting, pre-mordanting and simultaneous mordanting, Jerrous sulfate is the darkest, with copper sulfate, alum and potassium dichromate as the lightest. Dyeing ayarn with this extract with mordants shows darker washed fastness in silk than in cotton, mordant generally helps the fixation of the natural dye on fibers. Dyeing without mordant is similar to dyeing with alum mordant at 5% concetration. Increasing the concentration ofmordant to 10% potassium dichromate manifests a significant change which can not be seen in all the treatments and strategies.