Natural Dyeing of Silk and Cotton Fabric with Red Pigment from Penicillium purpurogenum which is Isolated from Goat Milk Contaminated Soil

Abstract

The use of much synthetic dye in dyeing industry resulted in dye containing wastewater which increases the environmental pollution. Therefore, the use of synthetic dye in industries must be replaced with eco-friendly non toxic dyes. The present study is an attempt to explore the posibility of water soluble red pigment of Penicillium purpurogenum as colorant for silk and cotton fabric. The red pigment was produced in potato-dextrose broth at a temperature of 30^oC in 14 days under a static condition. Red pigment extract was evaluated by dyeing on silk and cotton fabric. The effect of process parameters of dyeing such as dye absorption to silk and cotton and fastness to washing and ironing have been studied. In addition, red pigment extract also analyzed by using LC-MS method. The pigment show high affinity with silk and cotton fabric and is found to give good color fastness to washing and ironing (rating 4). LC-MS Results revealed that red pigment extract obtained protein compound complex. Natural red pigment extract has a significant potential for new dyeing techniques and will provide useful alternatives to synthetic dyes

Keywords: Red pigment, Penicillium purpurogenum, silk and cotton fabric