Provided is a method for creating a color scale that can be used as a more objective criterion of assessment, for analysis of color change properties of chewing gum associated with the progression of mastication by a dentulous person and for use in evaluating mastication force with color-changing chewing gum. A method for creating a color scale, the method comprising causing a plurality of dentulous persons to masticate a color-changing chewing gum, finding a regression formula between the color presented by the chewing gum after mastication and the color difference in the chewing gum before and after mastication, and also finding a regression formula between the number of mastications and the color difference in the chewing gum before and after mastication, to thereby find the number of mastications by the dentulous persons and the color difference in the color presented by the chewing gum after mastication.本發明提供一種比色表之作成方法,該比色表係分析隨著有齒顎者之咀嚼進行而口香糖變色特性,而可使用作為使用於利用變色口香糖評價咀嚼力之更客觀判定基準。該比色表之作成方法係由複數位有齒顎者咀嚼變色口香糖,求得咀嚼後之口香糖之呈色與咀嚼前後之口香糖之色差之回歸式,進而求得咀嚼次數與咀嚼前後之口香糖色差之回歸式,而求得有齒顎者之咀嚼次數與咀嚼後之口香糖呈色之色差。
