Add salt or white vinegar in water and soak for a few minutes before washing. For cotton fabric of higher quality, add a tiny amount of alumen instead.

• 每次都可在水中加些食盐或白醋，将棉布制品浸泡几分钟再进行洗涤。若洗涤高品质棉制品可在水中加少量明矾。