Procedure for obtaining subtitles in positive cinematographic films, characterized in that, in a film whose layer of the photographic image is covered by a protective layer that has been eliminated in the place of the letters, so that the image layer is Naked and can be removed by means of a gelatin solvent, a solution capable of coloring or of blackening the image layer in the places where this solution can, by diffusion, penetrate the image layer is made to act for a limited time. the border of the letters of the subtitle, so that the subtitles present around the letters of the same a halo, a fillet or a zone of dark or black color. (Machine-translation by Google Translate, not legally binding)
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