A photographic film in which the negative image is converted to a positive image during the developing process.

Photographic film that produces a positive image (transparency/slide) upon exposure and development.

Film or paper designed to produce a positive directly from exposure and processing, without the need of a negative.

Film that produces a positive image (a transparency) on exposure and development.

In photography, a reversal film is a still, positive image created on a transparent base using photochemical means. The terms slide and transparency are also used. Contrast with negative and print.