About Video Tapes |
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It is recommended that you keep tapes even if they have been converted to high-quality digital masters. You may still need them later, even if that may now seem unlikely. When tapes have been digitised so that they no longer have to be consulted, they can be stored at relatively low temperature, which is not always feasible when users need to have access. Stable conditions are the first requirement for storage, and moving tapes from cool storage to room temperature for consultation is not recommended because of the fluctuations in temperature and humidity. If there are digital copies to consult, the original tapes can be stored
under more strict conditions and may have a longer life. The best method
to store magnetic data is in a vacuum environment. Oxygen and moisture
are a very bad combination for the life of metal particles used for magnetic
media.
When the first 2 inch colour video recorders were introduced by Ampex, several film companies had the idea of transferring 35mm negative film to 2 inch Quadruple tape. Earlier they had already converted from older 35mm colour negatives, three separate black and white positives on 2 inch. video tape by Ampex. It was thought that in later years it would be possible to make a bright new 35mm film negative from the Ampex tapes. Apparently thousands of films were transferred to Ampex in this way, and the original 35mm films discarded. In the early 1970s it was discovered that magnetic tape was not the best
possible archival format after all. When the tapes had been stored for
about ten years, the video signal turned out to be seriously impaired.
Various factors had affected the magnetic information to such an extent
that the image had become blurred. This was a tremendous shock, as the
original film already had been discarded. |
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