Phosphorescent screens

摘要

Phosphorescent screens which are useful for such purposes as intensifying screens for radiographs are comprised of a support on which is coated a layer of finely-divided particles of a phosphor dispersed in a polymeric binder which has been cured by radiation. The phosphor layer includes voids formed by evaporation of a component which is present in the coating composition from which such layer is formed. Curing of the binder is carried out by use of suitable radiation, such as ultraviolet light or high energy ionizing radiation, and evaporation of the void forming component is carried out simultaneously with or subsequent to the radiation-curing of the binder.