The HP Color LaserJet CP3505 uses four compatible toner cartridges, each rated at about 6,000 pages. Black is Q6470A. Cyan is HP 503A (Q7581A), magenta is HP 503A (Q7583A), and yellow is HP 503A (Q7582A). The same supplies also fit the Color LaserJet CP3505dn, Color LaserJet CP3505n and Color LaserJet CP3505x.
