黑棉运动裤膝盖长时间发红是正常现象,可以自己重新染色。染色方法如下:
1.第一步是准备黑色染料和50克盐,然后混合在一起,放入盆中。
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2.第二步,将适量沸水倒入盆中,搅拌,使染料和盐溶解在染料溶液中。
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3.第三步是将需要染色的黑色运动裤浸入染料溶液中。搅拌后,将裤子浸入染料溶液中约两天,使裤子完全着色。
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4.第四步是将染好的运动裤用清水洗净,直接晾干,小心不要扭曲或弄干。
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5.最后,将红色膝盖的黑色运动裤恢复原样。
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