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Preservation Self-Assessment Program (PSAP) | Audiotape
http://psap.library.illinois.edu/collection-id-guide/audiotape
An uneven tape pack can allow dirt to come in contact with and abrade the tape's surface and edges. Unevenly wound tapes can cause the tape to warp and lose its shape, which will affect playback sound quality. Tapes are also prone to blocking or pinning, which occurs when layers of tape adhere to adjacent layers.
Magnetic Media - Video - Archives
https://www.archives.gov/files/preservation/formats/pdf/video-magnetic-media-condition-assessment-table.pdf
help from an Audio-Video Preservation Specialist. Uneven Tape Pack : Usually occurs when tape is over-tensioned either because it is sticky or something has obscured the tape path. Tape does not lay flat around the hub. It appears stacked or at uneven heights. Or it may appear
Magnetic Media Audio Condition Assessment - …
https://www.archives.gov/files/preservation/formats/pdf/audio-magnetic-media-condition-assessment-table.pdf
Magnetic Media - Audio Problems Identification Remedies Sticky Shed Syndrome (SSS) The breakdown of the binding and/or backing layer. Also referred to as binder hydrolysis. ... Uneven Tape Pack . Usually occurs when tape is over-tensioned either because it is sticky or something has obscured the tape path. Tape does not lay flat around the hub ...
APPENDIX 1: Ampex Guide to the Care and Handling of ...
https://www.clir.org/pubs/reports/pub54/care_and_handling/
Bent or nicked reels, therefore, should be promptly discarded before significant tape edge damage results. If an uneven tape pack is noted within a cassette, it may be appropriate to copy any valuable data for the same reason. Tape pack/wind quality. Tape is least vulnerable to external damage when wound in a smooth, even pack.
Ampex Video and Audio Tapes - Library of Congress
http://lcweb2.loc.gov/master/mbrs/recording_preservation/manuals/Ampex%20Video%20and%20Audio%20Tapes.pdf
in uneven tracking with constantly changing relative azimuth. Edge deformation occurs whenever tape is unevenly spooled and subsequently crushed by the reel flanges. Care should be taken to allow for a smooth, compact tape pack, both during play and shuttle modes. If your machine is equipped with a special shuttle
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