HP LaserJet Pro 300 color Printer M351 series - Toner consumption

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Toner consumption

EconoMode uses less toner, which might extend the life of the print cartridge. HP does not recommend

the full-time use of EconoMode. If EconoMode is used full-time, the toner supply might outlast the

mechanical parts in the print cartridge. If print quality begins to degrade and is no longer acceptable,

consider replacing the print cartridge.