A printing device (200) and method for controlling the curing of ink are described. An example printing apparatus has a printing module (230) with at least one printhead for printing a swath of a printed image and a print controller (220) arranged to generate image and print control data for a plurality of swaths. A curing module (270) is arranged to receive, for each of the plurality of one or more swaths, image and print control data and to control, before a printed region of the print medium (250) corresponding to a particular one or more swaths arrives, one or more operating parameters of the curing module (270) based on data values within said image data and printing parameters within said print control data.