E-3 process


The E-2 process and E-3 process are outdated processes for developing Ektachrome reversal photographic film. The two processes are very similar, and differ depending on the film. Kodak sold kits that could process either kind of film.
Films are processed at 75°F with a tolerance of only 0.5°F. The steps are:
After this, the film is removed from the tank and thoroughly exposed with a bright light. Replace in tank, though the lid was no longer required.
Films designed for E-2 and E-3 are prone to fading because of the instability of the color dyes. The processes were phased out in 1974 in favor of E-4, and two years later E-6 was introduced which remains in use to this day.