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color mask / facemask

color mask

Disposable masks are essential during the epidemic. We basically change masks according to our feelings during daily use. However, the effective use time of masks is 4 to 6 hours, beyond which the protective efficiency is greatly reduced. The color-changing mask USES irreversible temperature-sensitive color-changing material to change the color of the inner structure of the mask through the heat of human breathing to remind people to change the mask in time. It will turn orange after 2~3 hours of use, and red after 4~6 hours. People can take off the mask at any time to see the use of the mask.

University

Central south university

Central south university
Changsha city, China

enlun zhang,
Central south university