| 摘要 |
The present invention relates to a method and materials that improve the printing properties of pigmented inks on glossy media, especially smear resistance, gloss, and differential gloss. The method is to apply a very uniform thin coating based on low molecular weight water-soluble polymers such as polyvinyl alcohol and acrylic resins and medium-high molecular weight polymer emulsion/dispersion on printed images. The polymers have good film formation and mechanical/physical properties. They also preferably have good jettability, either by thermal or piezo methods. The thin coating is preferably applied by jetting process through one of chambers of the ink cartridges, but can be applied by other processes such as Meyer rod, roll coater, etc.
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