The Technicolor three-color camera cinematography is the three primary aspects of a scene (red, green, and blue) on to three separate film strips, simultaneously. Operating at normal speed, without fringe or parallax,in balance, and in proper register with each other.
These separate strips are developed to negatives of equal contrast and must always be considered and handled as a group.
From these color separation negatives, they print by projection through the celluloid of a specially prepared stock which is then developed and processed in such a manner as to produce positive relief images in hardened gelatine.
These three hardened gelatine reliefs are then used as printing matrices which absorb dye and then transfer this dye by imbibition printing onto another film strip, when it has received all three transfers, becomes the final completed print ·ready for projection.
To carry on the process of imbibitions (absorption of dye by gelatine), it is merely necessary to press the matrix film into close contact with a properly prepared blank film and hold it there for several minutes. Matrices, of course, can be used over and over again.
The colors of dyes used in the transfer process must be the subtractive primaries, namely, minus-red (or cyan), minus-green (magenta), and minus blue (or yellow).
Important films were made using the three strip Technicolor. To name a few: Becky Sharp (1935), Wizard of Oz (1939), Black Narcissus(1947).