This article is from the rec.arts.movies.tech FAQ, by Scott E. Norwood snorwood@nyx.nyx.net with numerous contributions by others.
It is similar to an interpositive, and is used for television/video
tape transfers. These transfers often increase image contrast, and so
are improved when they are mastered from a low-contrast print. These
prints can be projected as well, but lack the color saturation and
(obviously) contrast of a standard release print.
 
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