Tribochromism
Encyclopedia
Tribochromism refers to a change in colour of a material caused by mechanical friction
Friction
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and/or material elements sliding against each other. There are several types of friction:...

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Tribochromatic materials are used when friction has to be detected. These materials generally change colour under mechanical stress conditions and then the colour gradually fades once the stress is removed.
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