When dissolved into DMSO as a polymer solution, the viscosity remained high and difficult to extrude at room temperature. However, the viscosity was further reduced at 60°C allowing ready extrusion to the tip of the nozzle. Direct writing with an applied voltage onto bare metal collector was not possible, due to electrical discharging. To avoid electrical discharge, a glass microscope slide was placed on top of the metal collector in a configuration that many MEW studies have previously adopted . As shown in Figure (left column), this permitted the direct writing of fibers, approximately 12±2 µm in diameter. Placement of the fibers, however, was reduced when the incoming fiber was close to an already printed one. This phenomenon was recently described as a limitation for MEW and other EHD direct writing technologies .