The commercial Kodachrome process resulted from an attempt by two inde-pendent inventors to produce a colour film that, for the ordinary photographer, would be no more complicated to use than the conventional black and white. The film is a monopack composed of three separate emulsion layers; the top layer is sensitive to blue, the second to green and the bottom to red light, and thin coatings of clear gelatin separate the layers. The Kodachrome developing process is a subtractive three-colour dye-coupling one in which the couplers are contained in the developer solutions rather than in the emulsions.
KeywordsEmulsion Layer Developer Solution Single Film Christian Science Monitor Substantial Salary
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