摘要：
The amount of indigo dye was fixed, and the dosage of sodium hyposulfite, caustic soda and color deepening agent DK were used as the influencing factor. The central compound test method was used to design the concentrated dyeing solution. After the mother liquor was diluted, the fabric was dyed, and the influence of each factor was evaluated by testing the color depth K/S value, and the system was optimized. The results showed that the addition of color deepening agent DK could significantly promote the K/S value of the fabric by 30%, and the dosage of sodium hyposulfite, caustic soda and color deepening agent gave signifi-cant impact on the color strength of the dyed fabrics. The optimized dosages for concentrated dyeing solution were indigo 75 g/L, sodium hyposulfite 108 g/L, caustic soda 50 g/L, color deepening agent 43 g/L. When the amount of color deepening agent was 40% of the amount of indigo dye, the dosage of indigo and sodium hy-posulfite could reduce by 20%. The friction fastness, color fading level and shade to chlorine and enzymatic wash were basical y the same, and the cost was reduced by about 15%.%在固定靛蓝染料用量的情况下,以保险粉、烧碱和增深剂DK为影响因子,采用中心复合试验法设计染色母液,母液稀释后对织物进行染色,通过测试颜色深度K/S值来评价各因素的影响,并对体系进行优化.结果表明,加入增深剂DK可以提升织物的染色深度30%,保险粉、烧碱和增深剂对织物染色深度的影响显著.染色母液体系中优化用量为靛蓝75 g/L、保险粉108 g/L、烧碱50 g/L、增深剂43 g/L.加入相当于靛蓝染料40%的增深剂,可以减少20%的靛蓝和保险粉用量,染色后的耐摩擦色牢度及耐氯漂和耐酵洗褪色程度、色光基本相同,成本降低约15%.
