Prediction of surface structure of coated paper and of ink setting time by infrared spectroscopy

摘要

Pigments and latex have an essential influence on coated surface structure and on ink setting. The combination of attenuated total reflection infrared spectroscopy (ATR-FTIR) and photoclinometry based on image analysis, measured at 10° illumination of paper surface in defined directions (MD and CD), allows to predict surface pores area and latex in coating as well as ink setting rate. Information about surface pores area and latex was provided by SEM surface analysis. Ink setting rate was evaluated by the set-off method. Dynamics of liquid penetration was studied by ultrasound method. Infrared spectroscopy and X-ray microanalysis using SEM/EDS method were used to determine kaolin, calcium carbonate and latex contents in coating.