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The re-use of the disposable syringe would bring about some serious health problems. The germs will diffuse into the human body through the syringe and then pose a threat to people. In order to avoid this kind of issues and warn people not to misuse the used syringe,***syringe imports a kind of special coating. This coating which is on the plug head will turn red as long as it meets water. So people are able to recognize which is used and get rid of possible risk.
Hu Nan University
Cai Zhiwen Zhang Haolin Ding Kebi Xu Jiayang