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Abstract
New cellulases from the fungi Acrophialophora nainiana and Penicillium echinulatum were used in the finishing of knitted cotton fabrics (biopolishing) and compared with the well established enzymes from Trichoderma reesei. Both cellulases reduced the pilling tendency with a lower weight loss than T. reesei cellulases. Cellulases from P. echinulatum were also studied in stonewashing of denim fabrics to obtain the fashionable aged look in indigo dyed jeans ware and were found to remove more colour from denim fabrics and produce less indigo dye redeposition (back-staining) than commercial acid or neutral cellulases under the test conditions. Efficiency was found to be influenced by pH during textile processing and the substrate used for the production of cellulases. Cellulases produced by P. echinulatum grown on cellulose showed better stonewashing results (higher colour removal and less back-staining) than cellulases produced on sugar cane bagasse. The substrate used during enzyme production of P. echinulatum cellulases seems to have a significant influence on cellulose composition, which affects textile processing results.