IMAGING FILM

An imaging film comprising, as an essential component thereof, an imaging structure formed of a thin layer of a metal, or metal-like, image forming material on which there is provided a thin layer of an energy sensitive material. The imaging structure, in turn, has a coating or layer of a sensitizing material thereon which material comprises a composition formed of a mixture of one, or more, amines, organic halogen compounds and a polymer or copolymer. The sensitizing material acts not only to increase the absolute sensitivity of the basic imaging structure but, also, to extend its spectral sensitivity from essentially the invisible, or ultraviolet light region to the visible light region enabling the imaging film to be used as a primary recording film for the production, for example, of original microfilm having, among other things, uniquely high contrast, resolution and acuity characteristics.