In part two of the experiment you are determining the proportion of blue and yellow dyes used to make the green dye by comparing the green dye color to many mixtures of blue and yellow dye that you prepare by regularly increasing the amount of blue while decreasing the amount of yelow by the sarme amount so the total amount of dye stays constant. This technique for analysis is called Solution In part two of the experiment you are determining the proportion of blue and yellow dyes used to make the green dye by comparing the green dye color to many mixtures of blue and yellow dye that you prepare by regularly increasing the amount of blue while decreasing the amount of yellow by the same amount so the total amount of dye stays constant. This technique for analysis is called Quantitative Analysis .