A procedure for the production of a contact reticulate for photograving and similar processes. (Machine-translation by Google Translate, not legally binding)

摘要

A process for the production of a contact grid for photoengraving and similar processes in which a glass plate and a diaphragm are interposed between a film and a light source, characterized in that the light beam from the light source is divided. Focus and that crosses the glass plate in two series of luminous rays of different tones and nuances to produce two series of points that cover different areas and that have different color tones, on the photographic film. (Machine-translation by Google Translate, not legally binding)