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Early method of bleaching cotton and linen goods on lawns A bleach worker. The textile bleaching (or bleaching of textiles) is one of the steps in the textile manufacturing process. The objective of bleaching is to remove the natural color for the following steps such as dyeing or printing or to achieve full white. [1]
A major source of chemical bleaching is hydrogen peroxide (H 2 O 2) that contains a single bond, (–O–O–). When the bond breaks, it gives rise to very reactive oxygen specie, which is the active agent of the bleach. Around sixty percent of the world's hydrogen peroxide is used in chemical bleaching of textiles and wood pulp. [7]
Reductive bleaching is also carried out, using sodium hydrosulphite. Fibers like polyamide, polyacrylics and polyacetates can be bleached using reductive bleaching technology. After scouring and bleaching, optical brightening agents (OBA), are applied to make the textile material appear more white. These OBAs are available in different tints ...
Scouring is an essential pre-treatment for the subsequent finishing stages that include bleaching, dyeing, and printing. [5] Raw and unfinished textiles contain a significant amount of impurities, both natural and foreign.
For large loads of dull-looking white clothes or bedding, it’s best to add no more than ¼ teaspoon of the liquid to water in the washer drum, according to the brand.
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Laundry bluing kit from France, with the bluing pellets. White fabrics acquire a slight color cast after use (usually grey or yellow).Since blue and yellow are complementary colors in the subtractive color model of color perception, adding a trace of blue color to the slightly off-white color of these fabrics makes them appear whiter.
The post How to Wash White Clothes to Keep Them Looking Bright appeared first on Reader's Digest. With a little care, your whites can stay bright, even as you enjoy your colorful life. The post ...
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