Toner and Ink Cartridge capacity is usually graded by page yield or ink volume.
Ink volume is the simplest, yet vaguest to understand and is the amount of ink physically contained within the cartridge. Unfortunately this means very little to the end user when trying to understand just how much printing to expect from it.
Page yield is much more useful to the end user, yet is often a source of confusion. Of course, each persons printing needs use different quantities of ink per page so not everybody can assume they will receive the stated page yield.
Expected Page Yield @ 5% Coverage?
This is where the industry standard grading comes in. Cartridges are specified with a recommended maximum page yield based on printing at a constant 5% coverage per page. The following example will help understand how this works in theory.
Example - A Toner Cartridge has a Page Yield of 1,000 pages @ 5% coverage
- Printing at an average page coverage of 5% should yield around 1,000 pages
- Printing at an average page coverage of 10% should yield around 500 pages
- Printing at an average page coverage of 20% should yield around 250 pages
- Printing at an average page coverage of 50% should yield around 100 pages
This is not an exact science due to many other factors involved such as paper type and using maintenance functions etc. But it does show a rough guide of how page yield expectations should be managed based on your print requirements.