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ABSTRACT
Annatto colorants derived from Bixa orellana L. seeds have been extensively used in a wide range of food commodities such as dairy products, flour confectionery, fish, soft drinks, meat products, snack foods, and dry mixes. To exploit its use as a colorant for textiles, this research study investigates for the first time pre-mordanting of wool with bi and tri metal salt combinations using aluminum potassium sulfate, ferrous sulfate, and stannous chloride mordants in order to develop natural and beautiful shades on wool with variation in hue and tone. The dyeing was carried by exhaustion method and dyed samples were analyzed using a Reflective Spectrophotometer in terms of CIELAB (L*, a*and b*) and K/S values and washing and light fastnesses were investigated according to I.S.O. standard recommendations. In the dyeing experiments, wool samples pre-mordanted with Fe + Sn displayed highest color strength followed by Fe + Al and Al + Sn combinations. The results showed that overall 36 different shades having good to very good fastness properties were produced by the use of different metallic salt combinations in the natural dyeing of wool using annatto dye.
摘要
红木色素来源于Bixa orellana L. 的种子已广泛应用于各种食品如乳制品、糕点、鱼、软饮料、肉制品、休闲食品、干混。利用其作为着色剂使用，纺织品，第一次考察预媒染双和三金属盐的组合使用硫酸钾铝羊毛硫酸亚铁的研究，和氯化亚锡媒染剂，以发展自然美与色彩、色调变化毛色调。以 cielab (L *、a * 和 b *) 和K/S为例, 用反射分光光度法对染色进行了分析, 并根据 I.S.O. 标准的建议对牢度进行了研究。在染色实验中，用Fe + Sn预染的羊毛样品显示出最高的着色强度，随后是Fe + Al和Al + Sn组合。 结果表明，通过使用不同的金属盐组合在羊毛的天然染色中使用胭脂红染料，产生了具有良好至非常好的坚牢度性质的总共36种不同的色调。
Funding
Financial support provided by University Grants Commission, Govt. of India; through BSR Research Fellowship in Sciences for Meritorious Students (Shahid-ul-Islam, Luqman Jameel Rather, and Mohd Shabbir) and Non NET fellowship for PhD candidates (Mohd Nadeem Bukhari) is highly acknowledged.