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FR475340D1914-02-091914-02-09Perfectionnements aux moyens permettant de réaliser la cinématographie en couleurs naturelles par sélection polychrome
ExpiredFR475340A
(fr)
Un procedimiento para la producción de capas blanqueables para la producción de capas blanqueables para la fotografía en varios colores, las cuales son ya sensibilizadas o lo serán antes del uso.