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As is known to all, a woundplast is for quick stopping of running blood of a certain wound and for the disinfecting effect. However, it can leads to severe trouble if it is not discarded at the appropriate time.
Hint Band-Aid is the woundplast of new concept. It could change color automatically to remind the users to take it off in case it causes harm so as to achieve better effect at healing the wound.
Fan,Yu & Yan,Chen