Porous roll with axial zones and method of proving printing liquid to a cylinder in a printing press

A roll for distributing printing liquid in a printing press comprising:

• a roll core having at least a first axial zone and a second axial zone;
• a first liquid feed for feeding liquid to the first axial zone;
• a second liquid feed for feeding the liquid to the second axial zone independent of the first axial zone;
• a porous shell covering the first and second axial zones;
• at least one first liquid distributing component in the first axial zone between an outer surface of the roll core and an inner surface of the porous shell;
• and
• at least one second liquid distributing component in the second axial zone between the outer surface of the roll core and the inner surface of the porous shell.