数码打样自定义专色色彩匹配方法

利用数码打样技术精确模拟自定义专色， 并对专色挂网方法进行研究。在专色实地精确模拟的基础上，通过分析数码样与印刷样的密度差值随着网点值变化的趋势，并利用分阶段拟合算法对网点-密度差值曲线进行拟合，然后通过拟合公式调整的数码打样密度值与实际测量的密度差值，实现专色挂网的精确模拟。通过对数码打样自定义专色色彩匹配方法的研究，可实现自定义专色以及专色挂网的准确模拟，并可应用于包含大量专色印刷的包装印刷、标签印刷及多介质印刷等领域。

Custom Spot Color Matching Method for Digital Proofing

The digital proofing technology to accurately simulate the custom spot color and screen printing of spot color was studied. On the basis of accurate spot color simulation, by analyzing the variation trend of density difference between the proof sample and the printed sample along with dot value, the curve of density difference corresponding to dot data was fitted by staged fitting algorithm. After adjustment of the actual density, the accurate simulation of screen printing of spot color was carried out. Through this method, the customized spot color matching for digital proofing could be realized, and it could be applied to the fields containing a lot of spot color printing such as packaging printing, label printing and multi-media printing.