Abstract: Apparatus and methods of controlling the temperature of printing ink or paint in a pad printing apparatus are described. The apparatus comprise temperature control elements that are connected to a chiller unit. Temperature sensors on a support plate or ink cup, or both monitor the temperature of the ink cup and/or ink. As the temperature of the ink in an ink cup rises due to ambient air temperature in the working environment, a chill medium is applied to the support plate, ink cup, ink or any combination thereof to cool the temperature of the ink thereby reducing evaporation of solvents in the ink to maintain a relatively constant ink viscosity.