This indication foil can be used to manipulations by external magnetic field exposure (as in the case of older mechanical electricity meters is possible).
After exposure of a magnetic field remains a characteristic pattern.
Through a very spot of magnetic field (stylus with magnetic tip), the film also as often described or painted.
The "Delete" is carried out by a large-area magnetic field, the particles again" in the form".
Through the universal application of additional applications are also conceivable.
The film works as a stand-alone device and is wear-free.
This text is machine translated.