3.1 Creasing of membrane switches, printed electronic device, or their components can affect their visual appearance, mechanical integrity or electrical functionality. This practice simulates conditions that may be seen during manufacture, installation or use.
3.3 Specific areas of testing include, but are not limited to:
3.3.1 Membrane switch flex tails or printed electronic device, and
3.3.2 Any component of a membrane switch or printed electronic device that may be subjected to creasing.