The invention relates to a
desizing and decolorizing composite
enzyme and a nostalgic-style
denim fabric washing process thereof. The
desizing and decolorizing composite
enzyme is prepared from the following components in percentage by weight: 30% to 35% of
desizing enzyme, 13% to 16% of ligninase; 20 to 26% of neutral
cellulase, 26% to 32% of tetrasodium ethylenediaminetetraacetate, 5% to 8% of anonionic surfactant and the balance of deionized water. The nostalgic-style
denim fabric washing process comprises the following steps of: desizing and decoloring treatment,
potassium permanganate strong decolorizing treatment, demanganization treatment, normal temperature washing,
polishing soft treatment,
dehydration and
drying treatment. According to the process, the desizing and decolorizingare carried out in one bath, so that the water and energy are saved, the abrasion caused by machinery to
denim fabrics is decreased, the strong damage is reduced, the
discharge of harmful substances is decreased, and the washed denim fabrics are free of pilling and
furring and have softer hand feeling.