Characterization of inkjet prints on separately coated and process bleached printing substrates

Paper production is a complex process of converting raw materials such as wood, non-woods or waste paper into high-quality paper products. The paper production process includes the stages of preparation, cleaning, sorting, shaping, drying and finishing. Each production stage is important for the quality and final properties of the graphic product. Depending on the intended use of the graphic product, the paper manufacturing process adaptsin order to achieve certain properties of the printing substrate, i.e. the final graphic product. The bleaching process, which removes lignin residues and other impurities from the fibers, is used to improve the optical properties of the paper. To reduce the dependence on wood sources, printing substrates made from a mixture of waste paper and barley strawpulp were used for paperproduction. The surface of these printing substrates was separately coated with titanium dioxide pigment to avoid the bleaching process during paper production, which reduces chemical contaminationof the environment. The aim of this research is to characterize the quality of solid prints produced on separately coated and process bleached printing substrates based on the parameters of surface coverage, gloss and print-through.