Velostat is a packaging material made of a polymeric foil (polyolefines) impregnated with carbon black to make it electrically conductive. It is used for the protection of items or devices that are prone to damage from electrostatic discharge. It was developed by Custom Materials, now part of 3M.
Due to it's properties of changing it's resistance with either flexing or pressure it is becoming popular with hobbyists for making inexpensive sensors for microcontroller experiments.
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