METHOD FOR MARKING PAPER

摘要

The invention relates to a method for marking paper including the following steps: forming an iridescent cellulose nanocrystal film from cellulose nanoparticles, dry-grinding the film into grains, incorporating the grains to serve as pigments in an aqueous mixture containing a binder, coating the paper with the aqueous mixture, and drying; wherein the step of forming the film includes three main sub-steps: manufacturing cellulose nanocrystals (CNC), placing same in suspension and forming a film; and wherein, during the sub-step of manufacturing cellulose nanocrystals (CNC), cellulose nanoparticles, having an elongate rod-like morphology, a form factor of 20 to 70, preferably 40 to 60, and a polydispersity index (PDI) of less than 0.1 are used as a starting material.