Two-sided printing Print Print speed up to 55 ppm (black) and 55 ppm (colour) Up to 1200 x 1200 dpi HP JetIntelligence CartridgeDynamic security enabled printer Certain HP printers are intended to work only with cartridges that have a new or reused HP chip or electronic circuitry. These printers use dynamic security measures to block cartridges using a non-HP chip or electronic circuitry. Periodic firmware updates will maintain the effectiveness of these measures and block cartridges that previously worked. Reused HP chips and electronic circuitry enable the use of reused, remanufactured, and refilled cartridges. Printing Secure printing Yes Watermark printing Yes Time to first page (colour, normal) 6.3 s Time to first page (black, normal) 5.9 s Warm-up time 150 s Print speed (black, normal quality, A3) 26 ppm Print speed (colour, normal quality, A3) 26 ppm Print speed (colour, normal quality, A4/US Letter) 56 ppm Print speed (black, normal quality, A4/US Letter) 56 ppm Print resolutio