Process Of Dyeing Having High Light Fastness For Natural Cellulose Textiles

摘要

PURPOSE: A dyeing process of high light fastness for a natural cellulose textile is provided to enhance light fastness and to prevent fiber strength reduction. CONSTITUTION: A dyeing process of high light fastness for a natural cellulose textile comprises: a step of dipping the natural cellulose textile fibers in a dyeing solution containing 1-20 g/L of hydrosulfite or 5-20 g/L of thioureadioxide, 0.1-2.0 g/L of leveling agent, 0.1-2.0 g/L of dispersing agent, 1-200 g/L of VAT dye, 1-20 g/L of soda ash or caustic soda(NaOH), and remaining amount of water at 90-130 Deg. C. for 45-60 minutes; a step of cooling and washing the natural cellulose textile fibers at 60-70 Deg. C.; and a step of dipping the natural cellulose textile fibers in a post-treatment solution containing 0.05-0.1 wt% of hydrogen peroxide, 0.05-0.1 wt% of acetic acid, 3-10 wt% of benzophenone-based light fastness enhancing agent or benzotriazine-based light fastness enhancing agent, and remaining amount of water at 90-135 Deg. C. and gradually cooling the natural cellulose textile fibers.