Selective Evaporation at the Nozzle Exit in Piezoacoustic Inkjet Printing

``Ugh, not again! Something's wrong with this printer\dots{}'' In inkjet printing the nozzles in printhead have intermittent idle periods, during which ink can evaporate from nozzle exit. Inks are usually multicomponent, and each component has its own characteristic evaporation rate, resulting concentration gradients within that alter jetting process. Through experiments, analytical modeling, numerical simulations, authors unravel complex physicochemical hydrodynamics associated drying of at a nozzle.