问：
清洗与xx面具，但随着时间的推移会变成黄色，并不是它如何回事？
答：
由于氧化，发黄，但不影响使用，如果他们认为丑陋的，可用漂白粉（次氯酸钙）解决方案，浸泡，冲洗，然后使用。
答：
棉纤维易石
答：
84漂白
Mask how yellowed?
Question:
masks cleaned with disinfectant, but over time will turn yellow, is not how it’s going on?
Answer:
because of oxidation, yellowing, without prejudice to the use, if they think that ugly, available bleaching powder (calcium hypochlorite) solution, soaking, rinsing and then use.
Answer:
cotton fiber prone to stone
Answer:
84 bleach04-12-10
