These graphs display the following: A summary of printhead abrasion and residue performance for all four ribbons on all four tested printers at 50% print coverage (figures 1a and 1b) and 100% print coverage (figures 2a and 2b). Also included are two graphs showing overall printhead abrasion and residue performance for each of the four ribbons on the four printers tested (figures 3a and 3b).