Cost-effective, reliable operation comes with HP Color LaserJet printing supplies. HP 645A LaserJet Toner Cartridges are designed together with the printer to provide reliable operation. The all-in-one supplies design provides time-saving operation with fewer supplies to order and maintain. For further time savings, HP toner formulas are engineered to support in-line printing and fast fusing at lower temperatures for fast warm-up time and a quick first page out.
Smart printing technology in HP LaserJet toner cartridges and your printer monitors the environment, sensing temperature and humidity (available with HP Color LaserJet 5550 only).To ensure consistent print quality, the system makes continuous, automatic adjustments to particle charge.These dynamic electrophotographic adjustments optimize color density, calibration and consistency to produce high quality results over the life of the cartridge.
HP customers consistently give HP the highest ratings for service and reliability. According to PC Magazine (August 2003), HP offers the best service and reliability in the printer industry, receiving a #1 ranking in its annual service and reliability survey for the 12th year in a row, as well as an A+ grade the second straight time this grade was included.