Edge numbers.

Frame numbers and other data (typically film manufacturer, film product code and film speed) printed onto the rebate of roll film.

Edge numbers are marked using a latent process, which means they are exposed at the factory and only become visible after developing is complete.

cf. image area, latent image, rebate, roll film, sprocket hole.

Entry last updated 2002-04-10. Term 401 of 1487.

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