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of the substrate that makes the substrate capable of absorbing visible light. The absorption of light makes the cloth look yellowish. Bleaching with oxygen removes the chromophoric sites and makes the cloths whiter. Oxygen is a degrading bleaching agent. Its bleaching action is based on ''destroying
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and the oxygen left by the grass provide the whitening action. The cloth becomes whiter day by day until it attains the full whiteness. It was a slow process, but safer for the subjected material. Chemical bleaching may harm the cloth, but in the grassing it hardly affects the cloth's strength.
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Grassing . — The oldest bleaching method is that of " grassing , " still used to a certain extent in Europe for bleaching linens. The linen fabrics are laid on the grass or ground for weeks . The oxygen of the air and that given off by green
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was an open area to spread cloth. It was a field near the watercourse used by a bleachery. Bleachfields were common in and around the
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The linens were laid out on the grass for over seven days after boiling with the ''lyes of ashes and rinsing''. The atmospheric
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in the late 18th century, chemical bleaching took over from grassing, as it was quicker and could be done indoors.
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the phenolic groups and the carbon–carbon double bonds.''. A major source of chemical bleaching is
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Dyeing: Comprising the Dyeing and
Bleaching of Wool, Silk, Cotton, Flax, Hemp, China Grass &c
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goods. The grassing method has been long been used in Europe to bleach
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This article is about a method of bleaching. For other uses, see
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Early method of bleaching cotton and linen goods on lawns
384:"Bleaching Agent - an overview | ScienceDirect Topics"
37:Grassing, laying out linens to bleach in sunlight
336:England), Textile Institute (Manchester (1923).
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247:Timeline of clothing and textiles technology
89:during the British Industrial Revolution
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407:Hage, Ronald; Lienke, Achim (2006).
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44:is one of the oldest methods of
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173:Linen Bleaching/ Grassing
28:Gassing (textile process)
21:Grassing (disambiguation)
26:Not to be confused with
112:conjugated double bonds
106:Oxygen bleaching action
16:Old method of bleaching
425:10.1002/anie.200500525
98:With the discovery of
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388:www.sciencedirect.com
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359:The cotton industry
322:Textiles by Britain
252:Scouring (textiles)
140:) that contains a
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455:Categories
393:2021-07-27
258:References
110:It is the
86:mill towns
433:1521-3773
46:bleaching
441:16342123
279:Textiles
241:See also
100:Chlorine
42:Grassing
148:Gallery
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69:oxygen
63:Method
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