Abstract: An apparatus and a method for creating a watermark are disclosed. For example, the apparatus may be a dryer module of a printing device. The dryer module may include a pair of transport rollers, a temperature gradient transport belt coupled to the pair of transport rollers to rotate around the pair of transport rollers, a heat source located above the temperature gradient transport belt, wherein the heat source applies heat to a print media that moves below the heat source via the temperature gradient transport belt, and a processor communicatively coupled to the rollers and the heat source, wherein the processor controls a speed of the temperature gradient transport belt via the pair of rollers and an amount of heat that is applied by the heat source to dry a printing fluid dispensed on selected portions of the print media at a desired rate to create the watermark on the print media.