HP 309 LaserJet Printing Supplies work with the printer to make high-quality colour printing easy, cost-effective and reliable. An improved electro-photographic process in the system achieves a broad range of vibrant colours and sharp text. HP 309 LaserJet Printing Supplies and the printer use an improved electro-photographic process to maintain accurate colour even in extreme conditions. Advanced toner formulas deliver a range of vibrant colours and sharp text. HP 309 LaserJet Printing Supplies and the printer are designed together. This cost-effective printing system provides reliable, efficient operation that minimizes user intervention and maintenance - saving time and improving productivity. HP 309 LaserJet Printing Supplies with Smart Printing Technology make automatic adjustments to optimise print quality and enhance reliability. Minimal user intervention saves time and improves productivity.