Noncontact and rapid analysis of the quality of the recording coating on ink jet printing by near-infrared spectroscopy

The preparation and manufacture of the recording coating on ink jet printing (RC-IJP) was proposed. The microstructure of RC-IJP was analyzed by scanning electron microscopy. Fourier transform near infrared (FT-NIR) spectra showed the combination and overtone vibrations information of the hydrogen-containing groups in the RC-IJP structure. FT-NIR spectra combined with partial least squares (PLS) methods were proposed for the analysis of the glossiness degree, smoothness degree and weight per unit area of recording material (Gr) in RC-IJP. 45 samples were selected for the calibration sets of glossiness degree, smoothness degree and Gr respectively. A spectral pretreatment method was used to develop a robust calibration model. After optimizing the spectral pre-treatment, the determination coefficient (R(2)) of the glossiness degree, smoothness degree and Gr was 0.86, 0.94, and 0.98, respectively. Root mean square error of prediction (RMSEP) of the glossiness degree, smoothness degree and Gr was 1.65, 13.86, 0.054, respectively. The analytical results showed that NIR spectra using PLS had significant potential as a rapid and accurate method for the analysis of the glossiness degree, smoothness degree and Gr in the manufacture of RC-IJP.