Ink Jetting

An apparatus for use in jetting ink droplets on a substrate during relative motion of the apparatus and the substrate along a process direction, the apparatus comprising:

• first and second jetting assemblies each including an array of jets, the first and second jetting assemblies at least partially overlapping in a direction perpendicular to the process direction so that some of the jets in the first jetting assembly align with some of the jets in the second jetting assembly along the process direction to form one or more pairs of aligned jets;
• and
• a mechanism to enable, in at least one pair of the aligned jets, one jet to jet a first ink drop that has a size smaller than a size of an ink drop the jet would otherwise be required to jet to form a desired pixel on the substrate and the other jet to jet a second ink drop that has a size sufficient to form the desired pixel in combination with the first ink drop.