Ink misting occurs when small droplets or long filaments of ink are created when the ink film is split in the roller nips and become diffused in the pressroom air. This is more often seen on high speed presses. Ink misting is often caused by an excessive heat and/or ink film on the rollers. Other causes include over emulsified ink, ink with too low of a viscosity, or excessive heat buildup in the ink rollers often caused by improperly set rollers, or rollers with a high durometer. Presses equipped with water cooled oscillator rollers remove excessive heat and keep the ink on the rollers at a constant temperature and viscosity.