#antihalation

• Antihalation — Serving to prevent, reduce, or eliminate the formation of a parasitic halo around highly illuminated points on a photographic or radiographic image. In a technical sense, it refers to special films or light-absorbing layers applied to the film base to prevent the internal reflection of rays back through the emulsion.
• Antihalation backing — A physical device, protective screen, or absorbing substance layer used to prevent the formation of luminous halos around photographic images subjected to local overexposure. It represents the noun form and phonetically adapted Romanian variant of the technical concept for isolating spectral reflections on transparent bases.