 On the back of the film base is an anti-halation layer that absorbs light which would otherwise be weakly reflected back through the film by that surface and create halos of light around bright features in the image.In color film, this backing is "rem-jet", a black-pigmented, non-gelatin layer which is removed in the developing process.Eastman Kodak manufactures film in 54-inch (1,372 mm) wide rolls.