Abstract: The invention relates to a method of compensating for crosstalk between adjacent charging electrodes (14) in an ink jet printer having multiple printing jets (12) or channels, each with one charging electrode (14). In order to provide a desired drop charge in a specific channel X, there is applied, to the corresponding charging electrode (14.sub.X), a charge potential V.sub.X which is compensated for in response to (i) any charge potentials V.sub.X-1 and V.sub.X+1 applied to charging electrodes (14.sub.X-1, 14.sub.X+1) of the nearest channel X-1 and X+1, respectively, on each side of the specific channel X, and (ii) in response also to at least charge potentials V.sub.X-2 and V.sub.X+2 applied to charging electrodes (14.sub.X-2, 14.sub.X+2) of the next nearest channel X-2 and X+2, respectively, on each side of the specific channel X. The compensation is achieved by selecting V.sub.