Recently, new bleaching methods are developed and presented as an eco-friendly alternative for the traditional bleaching processes. Traditional bleaching chemicals such as sodium hypochlorite, potassium persulfate, potassium permanganate, hydrogen peroxide, sodium perborate, sodium percarbonate, and benzoyl peroxide is harmful to human health and the environment. In this study, new eco-friendly and sustainable denim bleaching processes are developed. Textile washing and giving effect process is provided by using only ozone with different techniques without using any harmful chemicals. In terms of both technical and visual aspects, successful results have been obtained in comparison with the traditional method in ozone technology. This new method process time, and water consumption has been approximately reduced in 53% ratio. Denim fabric is a kind of woven fabric, which is mainly made of cotton fiber, and it is also produced from fibers such as polyester, elastane, linen, viscose. Denim, which has a wide variety of patterns that can be woven with various construction in recent years, is a type of fabric whose warp is usually dyed indigo dyestuff [1]. Ozone as for that, is a compound consisting of three oxygen atoms and has a higher energy than atmospheric oxygen. Ozone is an oxidative substance and its redox potential is higher than that of hydrogen peroxide [2]. Thanks to this oxidation property of ozone gas indigo molecules of denim fabric are degraded quickly. Given effects in traditional denim bleaching can be given with ozone gas and without any harmful chemicals. While there is excess water consumption for traditional denim washing, ozone bleaching system needs far fewer water and reuse of ozone bleaching wastewater is possible. While there is excess water consumption for traditional denim washing, ozone bleaching system needs far fewer water and reuse of ozone bleaching wastewater is possible.
Anahtar Kelimeler: denim bleaching, ozone, giving effect
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