Extended Data Fig. 4: Measurements of critical pressure, pcr, for various nozzle lengths and materials.
From: Voxelated soft matter via multimaterial multinozzle 3D printing
a, A variable pressure (P) source is placed in series with a microfluidic flowmeter and an ink-filled nozzle to measure the critical pressure for a given nozzle tip length, L. b, Representative set of measurements of flow rate versus pressure. The arrows represent the critical pressure for each nozzle tip length, at which yielding is first observed. c, Measured critical pressures analysed for different silicone elastomer inks (varying ratios of SE 1700 to Sylgard 184) as a function of the nozzle length. The dashed lines are linear regression fits and error bars represent the resolution of the pressure steps used for the analysis (n = 1).
