Abstract: In order to improve accuracy of the computer color matching better, through analysis the types and methods of computer color matching calculation model. Though substitution a computing calculation model to contrast and validate tristimulus values model, spectral color model of the two calculation model .Experimentally measured 90% of the concentration L, a, b values of Y, M, C tri-color ink. The experimental data were calculated their tristimulus values X, Y, Z, and color difference.Compared the results with the standard X, Y, Z values and calculated color difference.Analysis the feasibility of color difference and the situation of computational model. It will benefit the calculation model with further research, and promote the development of computer color matching.
Key words: Spot color inks; computer color matching; a mathematical model; color difference;