介绍了彩色相纸及负片用青成色剂的演变，包括各种类型青成色剂的优缺点、现行负片中青成色剂的作用机理、应用条件。
The evolution of cyan couplers for color paper and color negative is introduced, including the peculiar characteristics of the different couplers, reaction mecha. nism and application condition.
并逐一介绍每种成色剂的结构、应用及其在彩色胶片中的作用原理。
Their structure, application and mechanism of each type of couplers are described.
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