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color-change Respirator / color-changeable respirator

color-change Respirator
color-change Respirator

It is designed to remind people to clean the respirator with the color changing.
There is a green circle,which is made up of material that reacts with the toxic substance.
When the color of green disappears,it means that the respirator should be washed.

University

Zhejiang University of Technology

Zhejiang University of Technology
Hangzhou, China

Design

Zhejiang University of Technology

Zhejiang University of Technology
Hangzhou, China

Han Fei