We were test printing into 24 well plates today, and making slight tweaks to optimise the extrusion pressure, printing speed, the supporting bath parameters and the thickness of the printed lines.

The panels on the left show how much we improved over the course of one day. Support bath is dyed red, the ink is in blue.

Top row – first attempt, fresh after print (left panel) and the lines 10 minutes after the print (right panel) showing considerable swelling.

Bottom row – printing a nice line after optimization. Left panel image taken straight after the print, right panel image taken after 10 minutes.