Improper selection of based ink tint ladder often leads to inaccurate solution of color matching optical constant when establishing the computer color matching database, which further affects the efficiency and accuracy of color prediction. To build the based ink database of K-M single constant theory color matching model, proposes first derivative and error sorting two tint ladder methods are proposed by analyzing the relationship between the ratio of based ink mixed samples and their absorption and scattering ratios. The test results show that the maximum spectrum difference is 0.0137, and the maximum color difference is 1.73 in the color prediction accuracy of the two tint ladder methods, while the number of based ink mixed samples ratios shrink to only 6.