The Research Of Computer Color Matching System Of Spot Color Ink

Artificial color matching depends on the experience of operator seriously, the production process control is emotional and it requires experienced operators, its operation not only lack of scientific and rigor but also has large randomness, poor control and easy to waste material and time. The spot color ink matched by hand has poor accuracy, low efficiency, difficult to maintain the stability of product quality. In order to make the product in different locations, different time, by different operators have the same printing results, the people introduce computer color matching system. So, it is necessary to improve the accuracy of the model of computer color matching to obtain accurate spot-color ink.In this paper, we firstly analysis the defect of single-constant Kubelka-Munk theory in spot color matching and introduce new two-constant Kubelka-Munk theory which was used in textile to spot color matching. Then, we build a model of spot-color ink matching which is based on tri-stimulate value taking (C,M,Y) as the basic ink .we also describe the process of the model and the iteration calculation in detail , give the way of how to calculate the model and design a corresponding experiment scheme to obtain colorant formula. Finally, we design an experiment to test the precision of the model.We can come to the conclusion that the actual result is mainly consistent with the result of color matching model from the experiment. If we can make some improvements on the process of the experiment and reduce the error of original data, the color difference between the model and actual result will be smaller and this color matching model will have more practical meaning.