Abstract: In an elongated fountain pan, for an elongated press dampening roll, having a liquid inlet, the improvement comprising, providing the liquid inlet in the form of an elongated liquid inlet means extending lengthwise of the pan and accordingly lengthwise of the roll, the inlet means having a plurality of liquid outlet apertures therein and spaced therealong and the inlet means having liquid supply line means connected thereto and in such manner liquid exiting from the supply line means into the inlet means subsequently exits via apertures adjacent the ends of the inlet means generally simultaneously whereby to maintain, during operation of the press, a uniform temperature of the liquid in the pan as measured along the length of the roll. Also disclosed, is a method of maintaining a uniform temperature throughout the liquid in the fountain pan of a printing press and a method of cleaning a fountain solution of a printing press.