Natural dyestuffs, which took the place of synthetic dyestuffs in the past, have started to be used consciously again thanks to the increasing understanding of 'environmentally friendly textile'. These natural dyestuffs are mostly obtained from plants or food waste. Coffee is the most consumed nutrient in the world after water. Therefore, there is a lot of waste of coffee in nature and it contains pigments that give it its natural color. In this study, products with different fiber contents (100% cotton, 98% cotton 2% elastane, 80% cotton 20% recycled cotton) were dyed using coffee waste, and different mordant substances (aluminum sulfate, chitosan, quetemary ammonium compounds). It has been tried to reduce the amount of coffee waste used by dyeing with coffee wastes at different rates by weight (1/1, 2/1, 4/1, 8/1). Thus, it is aimed to provide less waste to the environment and to increase the color efficiency by making a more sustainable dyeing process. In addition, it is aimed to give a new direction to the denim sector by improving the rubbing and washing fastness values of dyed products. As a result of the studies, products with a product weight/coffee waste weight ratio of 8/1 were obtained with high crocking and washing fastnesses and without major losses in color tone.
Denim products are still popular today, as they provide wearing comfort and a sense of specialness to those who wear them. The most important factor that makes it popular is the denim washing processes that give the final appearance to denim products. Permanganate and stone washing processes are two of the most frequently applied methods in washing processes. Although the chemical potassium permanganate provides a good bleaching effect, it is a harsh chemical that is harmful to human health and to the environment. In this study, it is aimed to eliminate the stone and permanganate used in denim washing process by imparting the snow washing process, which is also available in our company, and to eliminate the environmental pollution caused by permanganate and stone, and thus lower the problems affecting manpower. It is aimed to find a solution to the problems of loss of strength in the product, tearing in the belt parts, the formation of broken traces and the presence of stone fragments in the wastewater by performing the permanganate and stone-free ecological snow washing process without permanganate and stone. After completion of the process, the physical performance of the products (tensile strength, tear strength and stretch & growth) were tested, and color removal effectiveness was observed, and thus the effects of the snow washing process on the performance properties of the denim product were examined. It has been observed that the desired effect as well as the strength values are in accordance with the standards.
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