At the time of # 1985, the Canon monochrome copier had color toner, but unfortunately,Since Y color toner was not on sale, color copying could not be realized.
Therefore, 3-color photographic emulsion was made and 3-color printing was realized with 3-color photographic paper.
After this, Bk color and Bk photographic emulsion were also completed, and full color printing was possible.
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