Today, video camcorders are used frequently to document momentous events in the life of a family - the birth of a child, high school graduation, summer vacations, and weddings. Unfortunately, as an information storage medium, videotape is not as stable as photographs. Videotape is a fragile medium subject to damage and deterioration from exposure to poor environmental conditions and inadequate handling practices. Even if properly cared for, magnetic tape may last only for a few decades. The metal oxide particles record and store magnetic signals.
Magnetic particles differ greatly in their stability.
Changes in the magnetic properties of these materials may result in an irretrievable loss of color, saturation, and sound clarity. Iron oxide and cobalt-modified iron oxide particles are the most stable of the commonly available magnetic materials used in videotapes. These materials are generally found in most grades of commonly available nonprofessional videotapes. The polyurethane binder holds the magnetic particles in place. Often the binder also contains special lubricants to smooth passage of the tape across the recording and playback devices.