Author(s)

Zakaria  ¹, Md. Eanamul Haque Nizam², Md. Hasan Al Mamun¹, Md. Abu Yousuf³, Ramjan Ali³, Lutfor Rahman⁴, Md. Raza Miah¹

¹School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, China.
²School of Fashion Design and Engineering, Wuhan Textile University, Wuhan, China.
³School of Textile Science and Engineering, Wuhan Textile University, Wuhan, China.
⁴Department of Textile Engineering, City University, Dhaka, Bangladesh.

In this study, aqueous extraction method is used because of its high extraction ratio, light fastness and also functional properties. In 1^st phase, for dyeing S/J cotton knit fabric with green walnut power ferrous sulfate is considered as a mordant. In this study, three different mordanting methods such as pre-, meta-, and post-mordanting are conveyed the dyeing process with the state of metallic mordant and without metallic salt mordants. In 2^nd phase, in dyeing for fixation ferrous sulfate was considered as mordants. Furthermore, the analysis and evaluation of each colour dyed material was done through following two terms for instance CIELAB (L*, a*, and b*) and K/S values. According to AATCC test methods, colour fastness to washing, crocking, perspiration of the dyed samples is determined whereas according to the ISO standard, the colour fastness to light was estimated and tested. When dyeing was carried out on S/J cotton knit fabric through considering optimum parameter like at 80°C for 60 min and at pH 4 which showed optimum results. From the results we can see, very good wash fastness was obtained while there is no fading of the colour, whereas the outstanding and moderate level of colour fastness to light and crocking is achieved.

Green Walnut Shell, Dye, Extraction, S/J Cotton Knit Fabric, Colour Strength, Fastness

 , Z. , Haque Nizam, M. , Al Mamun, M. , Yousuf, M. , Ali, R. , Rahman, L. and Miah, M. (2017) Dyeing of S/J Cotton Knit Fabric with Natural Dye Extracts from Green Walnut Shells: Assessment of Mordanting Effect on Fastness Properties. Journal of Textile Science and Technology, 3, 17-30. doi: 10.4236/jtst.2017.32002.