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Jeans bleaching – advantages and risks of different bleaching processes – part 3

The last part of the article series compares the different methods in jeans bleaching, which have been elaborated in detail in part 2, and summarize their advantages and disadvantages. The used chemicals in each of the processes are assessed against ecological criteria, especially considering the targets the ZDHC program, in order to find processes with low environmental impact. The target is to select processes which have a good price/performance level and a, good reproducibility, while using environmentally friendly chemicals, or avoid the use of chemicals.
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Jeans bleaching – advantages and risks of different bleaching processes – part 2

In this part different jeans bleaching processes are discussed, their benefits and features as well as their problems. The study is looking at chemical and mechanical treatments for open-pocket machines for fabrics and single garments. The methods discussed include bleaching processes using hypochlorite, permanganate, hydrogen peroxide, organic peroxides, laccase, ozone, glucose, sandblasting, electrochemical and laser engraving
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Jeans bleaching – advantages and risks of different bleaching processes – part 1

Jeans have become very popular across all age groups, and genders. Popular fashion shades include many styles and colors, from dark blue to bright blue and from black to grey. To obtain pale shades, jeans are usually bleached. This first article gives an overview of the working sequence and key requirements of the bleaching process
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Sustainable colouration concepts: Issues in textile processing of cotton

Cotton processing has various ecological problems, from polluted effluents to high water and energy consumption. Various concepts to improve this situation are discussed in this article. Best available technology can achieve zero discharge, especially by careful selection of dyes and processes, proper effluent treatment and recycling concepts. Future prospects include modified cellulose fibres, by chemical modifications, or bioengineered cotton.
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Slow progress in the Greenpeace detox campaign

Meanwhile a series of famous big brands have joined the zero discharge of hazardous chemicals (ZDHC) programme, a response to the detox campaign initiated by Greenpeace in 2011. However, the speed of progress has been criticised by Greenpeace. We put some lights on the reasons why.
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Sustainable colouration concepts: waterless dyeing

This article series is about latest trends and future perspectives in coloration technologies. This part is about coloration using waterless dyeing concepts which is based on supercritical carbon dioxide, a technology invented in Germany 25 years ago.
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