要怎么让发黄的白衣恢复白色？

具体操作有如下几个步骤：

一、先去掉污渍。如果衬衫上有污渍，先用纸巾、勺子或手边有的工具，去掉洒在上面的污渍。越快清理污渍来源，衬衫就越耐久。

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二、用洗衣精预处理污渍。接下来，直接将一小滴洗衣精倒在衬衫上残留的污渍。用不打算再用来刷牙的软毛牙刷把污渍擦干净。就让洗衣精留在衬衫上，等它凝固，帮助松开污渍，长久下来白衣会更白。

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三、将预先处理过的白衬衫（和其它白色衣物）放入洗衣机。倒入漂白剂。

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四、设置能用的最高水温就可以启动洗衣机了。为了取得最佳清洁和漂白效果，不妨用衣服面料能承受的最高水温。如果不清楚衣服能承受多热的水，可以检查护理标签（一般来说，棉、牛仔布等坚韧织品可以承受热水，更脆弱的面料或人造纤维只能承受温水）。

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五、洗好衣服后，取出白衬衫和其它衣服晾干它。必要时可以重复上述步骤。

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