Early additive color process (1909–1950s) — three B&W negatives exposed through color filters, optically combined. Visible in silent and early sound films.
Pathé Color operates on a principle that few people are aware of today: three separate black-and-white film strips are exposed simultaneously, each behind a different color filter (red, green, blue). The camera was designed accordingly: a multi-film magazine arrangement that captured three images in parallel. During projection or duplication, these three strips were then optically superimposed and registered – the additive color mixing principle.
The process had massive practical consequences for production. The exposure time was about a third longer than for black-and-white, as light was lost through the color filters. This meant more artificial lighting, larger sets, and higher electricity costs. And the sharpness suffered – three strips that had to be precisely registered led to deviations, especially with movement. Color fringing was visible on fast-moving objects, particularly during horizontal camera pans. Therefore, productions consciously held back on movement-intensive scenes or switched back to black-and-white.
For editors and projectionists, Pathé Color was a nightmare: the three strips had to run in perfect synchronization during duplication, otherwise the color registration would shift. A jump in the film led to color loss and shifts. Specialized equipment was needed in the projector – normal black-and-white preview machines did not work. This is also the reason why so many of these color prints are lost today: the technology was too specialized, too prone to failure, and too expensive to operate.
Visually recognizable by its slightly muted, pastel hue – true Pathé Color does not appear garish, but soft and with less color saturation than later Kodachrome or Technicolor productions. Red lips appear duller, greens are more subdued. This was also a conscious aesthetic choice: the technology couldn't do everything, so they worked with its limitations. Pathé Color was in use from around 1909 until the mid-1950s – after which it was completely replaced by more modern additive and later subtractive processes.