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          务必反面阴干  :太阳紫外线会加速纯棉和化纤纤维氧化变黄发硬 ,发黄白醋能彻底中和纤维里残留的洗白碱性洗涤剂 ,

          一 、白色
        2. 4. 淘米水 / 柠檬片煮沸法(适合纯棉耐高温白T恤 、衣服用软毛牙刷轻轻刷揉后静置 15 分钟 ,发黄掌握“温水+活氧彩漂粉浸泡”或“白醋/小苏打中和去黄” ,洗白 白衣服晾晒防发黄铁律