the opposing side of the wafer flows to the supply channel 6 through the ink feed conduits 14 the upper and lower ink supply channels 10 and 12 are separate color channels although for greater color density they nay print the same color ink u2014 eg a ccmmy printhead rows 20 and 22 above the supply channel 6 are transversely offset with respect to the media feed direction 8 below the ink supply channel 6 rows 24 and 26 are similarly offset along she width of the media furthermore rows 20 and 22 and rows 24 and 26 are mutually offset with respect to each other accordingly the combined nozzle pitch of rows 20 to 26 transverse to the media feed direction 8 is one quarter the nozzle pitch of any of the individual rows the nozzle pitch along each row is approximately 32 microns nominally 31 75 microns and therefore the combined nozzle pitch for all the rows in one color channel is approximately 8 microns nominally 7 9375 microns this equates to a nozzle pitch of 3200 npi and hence the printhead has u2018 true u2019 3200 dpi resolution fig2 is a single unit cell of the nozzle array each unit cell has the equivalent of.