A printing press has at least one ink carrier. A printing substance, such as ink is applied to the ink carrier and at least some of that ink is transferred to a substrate at a separation location. A light-hydraulic effect is used to accomplish this separation. Radiation energy that is transferred to the printing substance stimulates this transfer of the print substance to the substrate to be printed. The transport of the radiation energy takes place by the use of at least two energy beams of different wavelengths.