151A Toner Cartridge (With Chip) Proton brand

Page yield refers to the approximate number of pages a specific toner cartridge is capable of printing. Determining page count can prove to be tricky as print density can vary from day to day for individuals. But some users simply print emails containing text, and others might be required to produce printouts of heavy graphics for brochures or catalogs and consequently print much fewer pages than normal.
Other factors include room temperature, printer condition, and toner age.
It is for this reason that the printer industry came up with the 5% rule.
Manufacturers use such yardsticks to guarantee.
How many pages a specific toner can yield? Firstly, 5% coverage would simply be a page printout of a text document containing no graphics with little or no bold characters on an 8.5 x 11 copy paper. An increase or decrease in page yield is therefore directly proportional to an increase or decrease in page coverage.