Abstract
The improvement of colorfastness properties of tie dyed cotton knit fabrics with reactive dye has been studied. Pretreated cotton knit fabric is use to dyeing for easy absorption and retention of dye. Color fastness properties of any dyed fabric are very important aspects as the end use of fabric depends on these properties. This study is to evaluate the color fastness to washing and perspiration using the method ISO 105-2CS:2002 and ISO105-E04. The fabric is dyed with reactive dye in same concentration but in two different temperature (30°C and 60°C) and with different amount of sodium carbonate (15 g/l, 18 g/l and 20 g/l) respectively. It is observed that the increasing temperature and using related amount of sodium carbonate the fabric absorbs more dye. In 30°C temperature the result of washing fastness is fairly good to very good where in 60°C the result is very good to excellent. Perspiration fastness result is fairly good to very good both in 30°C and 60°C temperature. The result shows very good of all washing and perspiration fastness in 20 g/l sodium carbonate. The result is concluded that the color fastness of tie-dyed samples is improved by the increasing of temperature and higher amount of sodium carbonate.
Highlights
Tie-dye is an ancient process of dyeing for fabrics or garments
Tion of synthetic dyes like reactive dyes, it can apply for tie dyeing process and this dye is comparatively cheaper than natural dyes
It was observed that the samples tied and dyed with standardized dyeing conditions of reactive red dye exhibited the excellent (5) wash fastness both in color change and color staining for the samples dyed with 20 gm/l sodium carbonate in 60 temperature and perspiration fastness is very good in color change (4.5) both in acid and alkali and good for color staining (4) both in acid and alkali
Summary
Tie-dye is an ancient process of dyeing for fabrics or garments. This method is applied on fabric by tying it strongly with ribbon or rope in predetermined design. Most of the time tie-dye is overcome by natural dye in room temperature. Synthetic dyes give excellent colorfastness than natural dyes with increasing temperature. The dye absorption by cotton fabric increases linearly with temperature [2]. On the other hands synthetic dyeing is easy than any natural dyeing process. Colorfastness means to absorb color perfectly and retain this color of any stage such as—washing, perspiration, sunlight and any chemical process. Good colorfastness of any fabric attracts the consumer and encourages wearing it
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