Dyeing of cotton fabrics using some natural dyes part II: some studies on dyeing properties of cotton fabrics using chelidonium majus [Roots]

ABSTRACT

The pre-treated cotton fabric with tannic acid [60g/l] was dyed in a bath containing natural colouring matter extracted from vegetable plants Chelidonium majus [roots]. Factors affecting dyeing properties such as concentration of colouring matter as well as pH values, time and temperature of dyeing bath were studied. It was found that the most suitable dyeing properties are obtained when colouring matter is obtained from 18 g Chelidonium majus [roots]/100 ml water using 5g/l sodium chloride, L.R 150, pH 6, dyeing was continued for 30 min at 70°C. Environmentally friendly mordants such as copper sulphate, ferrous sulphate, stannous chloride and alum were added using three mordanting methods: [pre-simultaneous - post] mordanting methods and overall fastness properties of dyed mordanted fabrics were assessed. In the recent years, growing interest in the revival of natural dyes has been manifested. This interest is the result of a worldwide movement to protect the environment for indiscriminate exploitation and pollution by industries. Natural dyes are considered to be complementary and not conflictive with the use of manufactured dyes in the textile industry as a whole. Chelidonium majus is an erect plant from 2-4 feet and is native to temperate Europe and Asia. Leaves are deeply pinnatifid, crenate or lobed, flowers are yellow medium sized, in a small peduncled umbel, sepals 2, petals 4; stamens many ovary of 2 carpels, fruit is a cylindrical capsule 1-2 inch long. It belongs to papaveraceae family[1]. The present work was carried out to optimize the conditions for dyeing cotton with natural colouring matter derived from Chelidonium majus [roots]. The evaluation of [K/S, L, a, b, delta E] for different dyed mordanted and/or dyed washed fabrics. Estimation of metal ions [ppm] of the dyed mordanted cotton samples [pre-treated with 60 g/l tannic acid] was carried out[9-2]