While rheological analysis can help elucidate the characteristics of inks, it does not fully encompass the useful evaluation that can come directly from extrusion print tests. Although printing parameters (including nozzle diameter, print speed, and extrusion pressure) can be altered to accommodate the ink and provide the best possible print, we printed each ink with the same parameters (0.41 mm nozzle inner diameter, 20 mm/s print speed, 100 kPa pressure) to enable comparison between the different inks when printed in a dark web design, as seen in Figure . The width of a single printed line, or strut, was measured for each ink (Table ) to indicate how closely the print retains the resolution of the nozzle used (0.41 mm inner diameter). Two inks, the highest concentration of PEDOT:PSS (2.0 wt%) and of MC (16 wt%), could not be printed using these parameters due to their high viscosity, and an extrusion pressure of 250 kPa was used instead for demonstration. Figure and Table reveal that the MC content has the greatest variation in print resolution under these conditions. Even though the ink with the lowest PEDOT:PSS content (1.2 wt%) has a similar, and even slightly lower, viscosity than the ink with the lowest MC content (8 wt%), the strut width of the 8 wt% MC ink is much wider, indicating much more spreading during the printing process. On the other end, the highest MC content ink (16 wt%) showed much less spreading than the highest PEDOT:PSS content ink (2.0 wt%), even though the inks again have a similar viscosity according to Table . The shear thinning plots in Figure demonstrate that the variation in viscosity between different inks depends on shear stress; the different PEDOT:PSS inks behave quite similarly at high shear rates compared to low shear rates. As such, the specific shear rate experienced during extrusion likely has a significant role how different concentrations of PEDOT:PSS or MC impact the printability of the ink. In this demonstration, even though the PEDOT:PSS concentration had a greater impact of the overall rheological behavior of the inks than the MC concentration, MC content ultimately had a greater impact on strut thickness, and thus printing resolution. Shear stress could be reduced by using less pressure or a wider nozzle, and alternatively shear stress could be increased by using greater pressure or a thinner nozzle. Again, and as expected based on rheological data, changes in BIS concentration had no noteworthy impact on printability.