Particle surface coverage was calculated through the segmentation of six images containing areas of 1.15 × 10 4 μm 2 from two replicate samples for each condition. The surface coverage was then expressed as the percentage of pixels identified as particles (Figure ). Decreasing surface coverage can be seen with solvent viscosity (Figure ). However, before concluding that viscosity impacts surface coverage, it is worth normalizing for the minor changes in other physical properties, using the normalization constants given in Table , which are explained further in Section S5. Equation S4 gives the expected surface coverage when rescaled by the capillary length and evaporation rate of EtOH. Any difference in the relative magnitudes of the surface coverage before and after rescaling suggests that evaporative effects are responsible for the observed changes in surface coverage. The rescaled values are plotted in Figure , demonstrating that not only do the observed surface coverages change relative to each other, but there is also no longer a clear trend between viscosity and surface coverage. This suggests that any effect of viscosity on surface coverage is insignificant relative to the effect of the differences in evaporative flux, quantified by Eq. 1.