Study of the Morphological Character of Spectral Reflectance of UV Flexopress in Different Conditions

Abstract

Under the different experimental condition, different combinations of halftone samples were printed out with UV flexopress. More than 100 groups from different substrates, print speed and photoinitiator of reflectance spectra of the samples were measured. The morphological character indices (spectral area, perimeter, depth, width of shoulder) are selected and the variations of sample of different printing conditions are analyzed. The conclusions are that, the correlation between these morphological indexes was obvious; 4 chosen morphological indices were removed, whose R2 was greater than 0.9 (R is correlation coefficient) and confidence level was greater than 0.05, the best morphological index was chosen for different character wavelength of different primary color; the variation of different morphological indices in different wavelength was distinct; the relationship between morphological character and the printing conditions was fitted by linear and polynomial curves, R2 is greater than 0.9.