E-6 is a film processing method used for slide film. Slide film, like other analog films, comes in standard 35mm sizes. When the film is processed, the E-6 method produces a true color, or color-positive transparency. The processed transparency is then typically cut and sealed in a slide mount. Historically, slides have been viewed using a projector as opposed to having prints made of the photograph. In contrast, C-41 is the primary processing method used for color negative film. In the past, there have been other color film processes such as ECN-2 and K-14. However, C-41 has proven to be the primary and preferred method of color processing. C-41 processing uses a combination of chemicals to produce a color-reversal film negative from which color prints are made.
