Designed to work together with HP Colour LaserJet 3500/3550/3700 printer series as a printing system Second-generation spherical toner that ensures accurate, consistent results Improved pigments and gloss enhancements result in a wider colour gamut and sharper colour appearance Optimal-yield, cartridges and long-life consumables ensure maximum printer uptime and minimum user intervention HP smart printing technology enables supplies status and usage information, shake-free cartridges, dynamic EP adjustments and cartridge installation assurance Improved electro-photographic process in the HP smart printing system monitors temperature and humidity and makes automatic adjustments throughout the printing process to optimize print quality under variable conditions-even under extreme conditions like high-humidity