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Procédé Tetrachrome

Description

Based on four primary colors, the process successively recorded two simultaneous images for two primary colors each. In projection, the four images were combined on screen, supposedly via a regular projector.

Secondary Sources

Anonymous (1913): The New Breon-Randabel Stereoscopic Color Film. In: Camera Craft. A Photographic Monthly, 20,7, Jul., pp. 335–336.

Anonymous (1913): Tetrachrome Colour Films. In: The Bioscope, 330,XVIII, Feb., p. 397.

Anonymous (1913): Colour and Stereoscopic Effect. In: The Bioscope, 328,XVIII, Jan., p. 247.

Egrot, L. (1913): Une Grande Actualité Scientifique. Films Tetrachromes. In: Ciné-Journal. Organe Hebdomadaire de l’Industrie Cinématographique, 6,233, Feb., p. 17.

Patents

FR 466 827; FR 464 345; FR 465 496; FR 453 754; FR 18 403; FR 465 543; BE 253 190