On-metal NFC Tags are provided with a ferrite layer between the chip and the adhesive part, so as to isolate the magnetic field of any metal surfaces. As a result, they can also be applied to metal surfaces.
These Tags can be printed very quickly with monochrome printing (serial numbers, QR, simple logos).
All our NFC Tags are tested before shipping. The non-working tags are marked with a black mark and are not counted in the send.