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古时为使棉布和麻布变白,得花费很长时间。用清净的河水将麻布洗完之后,晾在野地上让日光晒,等着它一点一点变白。后来发现将布放在灰水里泡过之后,可以缩短变白的时间。在欧洲发明了用变质发酸的牛奶洗布的方法。肥皂早就有了,就用奶和肥皂交替地洗,这样可以大大加快漂白的时间,就这样也得数月之后。这项发明是盛产牛奶的荷兰搞出来的,因为荷兰人对外严守漂白方法的秘密,而麻布必须漂白之后方可使用,所以欧洲人得远道去荷兰漂白布匹。18世纪,荷兰的漂白工人不少去了英国,英国也能漂布了,但漂白的时间并未因此而缩短。
In ancient times to make cotton and linen white, it took a long time. After washing the linen with a clean river, dry it in the fields and let the sun soak, waiting for it to turn white little by little. Later found that the cloth will be placed in the gray water after the bubble, you can shorten the white time. Invented in Europe with metamorphic sour milk washing method. Soap has long been there, it is alternately washed with milk and soap, which can greatly accelerate the bleaching time, it would have a few months later. The invention is made in the Netherlands, which is rich in milk, because the Dutch strictly observe the secrecy of the bleaching process, and the linen must be bleached before it can be used. Therefore, Europeans can go afloat to bleach cloth from the Netherlands. In the 18th century, many bleaching workers in the Netherlands went to Britain, and the United Kingdom bleached cloth, but the bleaching time was not shortened.