A solid 50% Cyan patch. Banding (horizontal lines across a solid color) is the plague of inkjets. On v5.1c, this patch is designed to reveal even microscopic variations in paper feed. If you see repeating light and dark stripes, your paper roller or stepper motor is faulty.
A series of overlapping triangles (Cyan, Magenta, Yellow, Black, Red, Green, Blue). This tests whether your printer’s driver is correctly mapping color spaces. If the red triangle turns orange or the green looks murky, you likely have a cartridge cross-contamination or driver profile error. printer test v5.1c
excels where default tests fail: