Three-dimensional characterization of ink vehicle penetration by confocal laser scanning microscopy
The penetration of the ink into the paper affects the final quality of the product, the amount of ink used, and the transparency of the paper. To better quantify the penetration of the ink vehicle in the base sheet, offset inks of cyan colored with a fluorescent dye, were printed on two papers, each being tested on one side only. The location of the vehicle is measured using the confocal laser scanning microscopy (CLSM). The vehicle of the ink penetration was observed using three-dimensional images. A target submerged in the oil could be used for high-resolution observation of the penetration of the vehicle. Differences in penetration of the vehicle types of ink and surface sizing on the paper may be characterized using this technique CLSM. Additionally, simultaneous observation of the ink vehicle and the paper has been demonstrated using a double staining technique and mode of sequential scanning CLSM. The ink vehicle was highly concentrated in the regions of strong paper filler content.
Keywords: Confocal laser scanning microscopy, penetration, pigments, fluorescence, optical properties, image analysis, polyvinyl alcohol, filler, sizing, immersion, dyes, confocal microscopy, scanning microscope, laser microscope, coated paper, ink, experimental study
Ozaki, Y., Bousfield, D. W., & Shaler, S. M. (2005). Three-dimensional characterization of ink vehicle penetration by laser scanning confocal microscopy. Journal of pulp and paper science, 31(1), 48-52.