The company that got the 8mm video format off the ground was Sony. So it's not surprising that Sony leads the way in D8 8mm Data Cartridges. D8 technology is based on Sony innovations. It reflects the 8mm technology which Sony spearheaded and the standards which Sony proposed. Sony High Density Alloy (HDA) metal particles have improved crystal structure and corrosion resistance for lower error counts, high archival stability. Sony High Cross-Linkage (HCL) binder has more long polymer molecules to help maintain performance through up to 1, 500 passes. Tough, polypropylene storage cases for storing your valuable data in a dust-free environment.