Color Prediction Model Of A Fluorescent Ink Print Under Ink Penetration Condition

In the modern print anti-countfeit technology, anti-countfeit technology with fluorescent ink is generally used and the anti-countfeit effect is one of the better effects.In this technology,in order to reach anti-countfeit aim,the ordinary ink and fluorescent ink are together used.Because of ink penetration in the paper, The color prediction of fluorescent ink halftone becomes very difficult. Under ink penetration condition,the present study aims at predicting the spectral reflection of fluorescent ink halftone which is a uniform samples and can be different concentrations, and finding the parameters which can adjust the color difference. Firstly, on the approximation that the ink is non-scattering and its refractive index is nearly equal to papers, we propose a spectral reflectance color prediction model for fluorescent ink halftone by making use of the theory of the light propagation in paper with long and short distance model.Then the new model is modeled and computed by MATLAB. The new model provides the prediction of the color of fluorescent ink halftone images with a theoretical method.