The one of the most important issue in roll-to-roll gravure printing is increase of ink transfer ratio
or printability. As the result of high ink transfer ratio or printability, we can assess the quality of the
printed patterns. The rheological properties are the important factors for the printability of
electrodes patterning. In this study, the rheological properties of conductive ink are controlled by
adding the solvent. The inks with different rheological properties are used for the patterning of the
electrodes of 100μm by gravure printing equipment. The various printing speed, which also affect
the rheological properties of conductive ink, is applied and the printed patterns are compared for
their width and aspect ratio. Decreasing in the ink viscosity as well as increasing in the printing
speed decreases the printability in gravure patterning, which shows that the rheological properties
are important factors for the printability of gravure patterning.