彩扩机的扩即原理在彩色扩印过程中，扩印条件需根据所扩彩卷品种、型号、照相性能、包罩密度等的不同，以及所用彩色相纸、加工套药的性能特点来确定。为了快速有效地根据各类彩卷、彩纸的组合制作出令人满意的照片，在彩扩机中设定了各种频道（通道）。每～个频道专为某一彩 Expansion of the expansion of Caikuoji principle In the process of color printing, printing conditions to be expanded according to the variety, model number, photographic performance, the density of the package, as well as the use of color photographic paper, the processing of drug sets to determine the performance characteristics. In order to quickly and efficiently according to the various types of Choi rolls, colored paper to create a satisfactory combination of photos, set in the Caikuai machine various channels (channels). Every channel for a particular color