Genuine HP ink housed within an original 45 HP inkjet cartridge can be costly. High speed, high volume mailing equipment, utilizing a HP ink cartridge as a printhead, may require versatile, fast dry, black ink for addressing or barcoding. The most common printing surfaces, when utilizing HP thermal inkjet technology, are coated paper, excluding aqueous stock. To meet these needs, we offer three distinct types of compatible versatile black ink, all requiring a drier while printing to 600 dpi. To keep costs low and save your budget, this industrial ink is offered within a remanufactured 45a thermal ink cartridge that has been thoroughly inspected and cleaned, post tested, then warranted. Super Fast Dry is a compatible HP versatile ink that has been tested and proven effective on mail addressing equipment including: Astro machine - Bryce to 27k, Secap and Kirk Rudy W'inkjets. Extensive testing has proven that this ink outperforms an original HP c8842a ink cartridge on more types of paper stock. Totaljet is our ink best suited for older model Buskro mailroom equipment. Versatile Turbo, an intensely dark fast dry ink, allows operators to run their mail equipment at a lower resolution, if they so wish. This HP thermal inkjet ink surpasses MERLIN standards at 150-200 DPI while increasing speed and throughput. This ink has been proven extremely effective on older model Buskro, Bryce 30K, Kirk Rudy NetJet, Sure Feed and Pitney Bowes AddressRight equipment. If you have any questions regarding whether a certain ink might be right for your application, we suggest placing a minimal order to test the cartridges in your mail equipment. A machine's performance might well vary depending on make/model, mailing or barcode software used, climate conditions, whether paper dust is cleaned from the machine or cartridges are reclipped afer use ...(If for some reason any of these inks do not work in your machine, our 180 day replacement warranty may not apply to your purchased cartridges. We replace only cartridges that are found to be defective upon return to our mill and after proper inspection procedures). As with any fast drying ink, we suggest only using alcohol and a lint free cloth to clean your cartridge heads. Using paper towels is strictly prohibited, as lint will aid in clogging cartridge heads.