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MARC21-007: Generation of motion picture
Duplicate that is usually negative, referred to as a dupe neg, and is a reproduction of the original picture or sound track. A duplicate negative is made from a master positive, which in turn was made from an earlier negative.
A duplicate is at least three generations from the original. Duplicate negatives may be prepared either to obtain characteristics not present in the original image, as in special effects work, or to protect and extend the production availability of the assembled original negative as when duplicate negatives are prepared for release printing simultaneously at different labs.
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