Iriscolor

Subtractive 3 color: Beam-splitter camera, imbibition printing
Similar to Technicolor, the Iriscolor process needed a special beam-splitter camera for exposing three black-and-white negatives on Kodak film stock. These negatives were used for imbibition printing. Between 1940 and 1942, Tobis Tonbild-Syndikat AG ...

Trucolor 3 color

Subtractive 3 color: Color separation on DuPont Release Positive Film

Eastman Panchromatic Separation Film 5216

Black and white panchromatic film: Three-color separation positives from color negatives

Eastman Panchromatic Separation Film 5235

Black and white panchromatic film: Three-color separation positives from color negatives

Kodak Panchromatic Separation Film 2238

Black and white panchromatic film: Three-color separation positives from color negatives