Water Injection Trials with Ink Emulsions by Using a Hele-Shaw Cell

Water injection tests were carried out with oily offset ink emulsions by using a Hele-Shaw cell. To determine the water pick-up of the offset ink, the speed and the width of the finger-shaped aqueous phase injected into the oily ink emulsion were measured. The findings show, that there is reason to assume that the Fairbrother-Stubbs equation can be applied to describe the water penetration of offset inks.