ink to be insoluble during the water-assisted conformal printing, a water insoluble binder, ethyl cellulose (EC), is chosen. Terpineol is chosen as the primary solvent due to its compatibility with EC. The high boiling point of the primary solvent terpineol ($\sim$218 $^{\circ}$ C) allows for a long ‘dwell time’ on the screen. This prevents clogging of the screens during or immediately after printing[@Ng2019a]. Isopropyl alcohol (IPA) (boiling point $\sim82.3 ^{\circ}$ C), is chosen as the secondary solvent for on press ink viscosity control. As the inks are printed using a hand-operated press, the inks do not have to travel from surface to surface within a printer and is hence subject to less agitation. This in turn prevents common printing issues such as foaming (the formation of air bubbles in the ink due to mechanical agitation usually caused by printing machines) and orange peeling (a mottle-like print defect characterised by dimples in the finished print, giving the print the texture of an orange peel. Usually caused by a failure of the ink to flow out in a smooth, uniformly thick film) [@Goldschmidt2003]. Therefore, an additive package (i.e. defoamers, surface tension modifiers) that are commonly used in commercial formulations is not included 