How is ISO page yield determined?
ISO page yield is determined by thorough testing, which differs slightly between monochrome and color cartridges.
Color inkjet cartridge yield and color toner cartridge yield tests
These tests (ISO/IEC 24711 and 19798) use a standard set of five test pages — four typical customer pages and one diagnostic page that are printed continuously until the cartridge is empty. The standard set contains a mixture of images and text in different quantities to achieve an average of 5 percent coverage per color per page (for an aggregate total of approximately 20 percent page coverage). Page yield tests are conducted in a controlled environment with a temperature of 23 ° C +/-2 ° C.
CPP is calculated by dividing running cost by number of printed pages on ISO page yield