They have added anti-yellow, they are all the goods meet the standards of the anti-yellow, white lace anti-yellowing effect can maintain normal six months, which is the current technology can do the longest time, and this is the time in the ideal state, it will be reduced if it is kept at a similar time in the hot and humid environment, so the yellow lace factory speculated may be due to the relatively long time anti-yellowing effect due to weakened, while there may be because the storage environment caused by improper.
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