Accurate color, precise image reproduction and crisp, sharp text every time you print. Chemically-grown toner and HP Smart printing system technology[1] deliver consistent results and reliable performance throughout the life of the cartridge.

Consistently accurate color and precise images. HP chemically-grown toner formulas are designed together with the HP Color LaserJet printing system. The uniform size and spherical shape of HP toner particles ensure a broad range of colors, higher gloss, precise particle control and placement and reliable performance. With HP’s second generation toner, you get consistently accurate color, precise images and crisp, sharp text across a broad range of plain papers and HP plain and specialty papers.

For your most persuasive sales materials, presentations and photos, the HP printing system offers a powerful new combination. HP’s chemically-grown toner formula and HP High-gloss Laser Paper work together with the printing system’s new image mode to produce optimal print quality.[3]

Save time with all-in-one HP 645A LaserJet supplies. HP Smart technology[1] makes automatic adjustments to optimize print quality and enhance reliability. Minimal user intervention saves time, improves productivity and lowers overall printing costs.

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[1] 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.