The function of photographic image formation is represented by the characteristic curves of photo sensitive materials. In color photography, the variation of characteristic curves of three colors (B, G, and R) affects color changes. Since the latitude of customer requirement is tight, the stability of characteristic curves is important. Traditionally, the deviation of characteristic curves from targets had been measured. Although noise factors were included in experiment and SN ratio was used together with analysis of variance, this was a non-dynamic approach. It is proposed in this study to use the function of chemical reaction and compare with the results from the traditional approach : observation of characteristic curves.
