I need your suggestions on best resistive/conductive material which has following properties to be used as a exposed to human body potentiometer:
- Tensile strength like hard plastic
- Scratch resistivity
- Linear conductivity
- Preferably in the form of thin sheet (<=0.3 mm)
- No health risk
As an example, I recently tried 3d printing a thin sheet using conductive PLA spool but my problem with that was lack of resistance linearity across the sheet.
I appreciate your responses,