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Explanation: bleache (vr)
To remove the colour from a material by chemical action or radiation.
To remove or decolorize impurities occurring in numerous materials, including textiles, paper pulp, vegetable and mineral oils, as well as such earth products as barytes and clays, in order to achieve whiteness. Bleaching usually involves a chemical reaction such as oxidation or reduction.
Agents commonly used for this purpose are chlorine, hydrogen peroxide, and sodium or calcium hypochlorite; chlorine dioxide and peracetic acid are used in bleaching of fine papers. Oils may be treated with special clays of high adsorptive power to achieve the same purpose. Simple exposure to air and sunlight has a similar effect over time period.
[Office de la langue française, 1983]
Simon Charass Canada Local time: 10:33 Native speaker of: English, French PRO pts in pair: 226