- The magnetic tape is composed of 2 main parts :
- The Base Film,
- The Magnetic Layer

The base film, made of Polyester (PET Poly Ethylen Theraphtalate), is a thin substrate onto which the magnetic layer is applied. This magnetic layer consists of magnetic paint which contains magnetic powder, binding, abrasive, hardening and lubricating agents.

A third layer is also added in the majority of formats : The Back Coating. Thanks to a special surface treatment composed of strong materials, this back coating (made of titanium, carbon, binders etc…) can insure 2 main functions :

1- Base film conservation against tape guide scratches during the VTR running,
2- The decrease of static charges accumulated during the VTR running mode. This back coating will improve the tape runnabilty and reliability compared to a tape which is not back coated.

The MP Tape Process:
The MP Tape process can be split into 4 main processes which are :
- The Mixing,
- The Coating,
- The Calendering,
-And the Slitting.
Hereunder a schematic diagram of the Mixing and Coating processes.