美国柯达公司生产的外偶型彩色反转片乳剂层中不含成色剂,所用扩散型成色剂溶于彩色显影液里,经摄影和首次黑白显影以后,分色曝光分色显影,三个感光层分别染上青、品红、黄色染料,从而形成彩色影像。该片在彩色胶片发展史上占有重要地位,是多层彩色片的始祖。虽然洗印加工方法繁复,要求精度高而难以控制,但由于它具有很高的色纯度和饱和度以及优良的分辨力, The United States Kodak Company’s production of dual-color color reversal film emulsion layer does not contain a coupler, the use of diffusion-type coupler dissolved in the color developer, after the first black and white photography and development, color separation, color development, three sensitized Layer were stained with cyan, magenta, yellow dye, forming a color image. The film occupies an important position in the history of color film, is the ancestor of multi-color film. Although the printing process complicated, requiring high precision and difficult to control, but because of its high color purity and saturation and excellent resolution,