Resolution
Silica sol with a particle size of 50 nanometers performed best, with a printing resolution of 1440 dpi, while silica sols with other particle sizes were slightly inferior.
Drying speed:
The coating containing silica sol can complete the drying of ink within 2 seconds, greatly reducing the risk of smudges.
Color reproduction:
Compared with traditional coating materials, the color reproduction of silica sol coating has increased by more than 20%, and the printed colors are brighter and more vivid.
Durability:
The experiment also found that the paper containing silica sol in the coating has excellent water resistance and scratch resistance, which is suitable for long-term storage printing needs.