BRS
VIVAX magnetic particles
VIVAX is Sony's cobalt-enriched gamma ferric oxide magnetic material formed into highly uniform, needle shaped particles. With their superior retentivity and high coercivity, VIVAX magnetic particles are the basis for the outstanding electro- magnetic response characteristics of Sony's BRS U-matic cassettes.
Carbonmirror backcoating
To promote smooth, low-stiction tape transport, BRS tape uses Sony's Carbonmirror backcoating. Together with the crosslinked binder and precision calendering, the backcoating's low friction coefficient contributes to the excellent runnability and durability of the BRS series.
Flexible crosslinked binder system
Sony employs a crosslinked binder system to hold the VIVAX magnetic particles in place. First, polymer strands attach to the particles themselves, then a crosslinker binds the strands to each other. The resulting three-dimensional network helps the tape with- stand the repeated jog, shuttle, and still-frame rigors of actual use. Surface smoothing reduces modulation noise for improved S/N ratio.
