- ISO/IEC 19752
ISO/IEC 19752 is an ISO standard method for the determination of
tonercartridge yield for monochrome laser printers, introduced in June 2004.
Traditionally, printer manufacturers did not employ a standard, well-defined methodology for measuring toner cartridge yield. The most widely used description of cartridge capacity was "number of printed pages at 5% coverage", with final results depending on a number of factors.
In contrast, ISO/IEC 19752 strives for a comprehensive and rigorous definition of the measurement process with the purpose of creating clear and objective criteria for comparison of cartridge yields. In particular, the standard provides a detailed definition and description of:
* Test preparations and environmental conditions
* Sample size (at least 3 printers with 3 cartridges each)
* Paper type
* Print mode
* Test document (provided in
* Cartridge and printer source ("not" supplied by manufacturer; purchased on the open market from at least three different sources)
* Error and process handling
* End-of-life criteria (for example, how many times the cartridges should be shaken)
* [http://www.iso.org/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=34911&scopelist=PROGRAMME ISO/IEC 19752:2004] at www.iso.org
* [http://www.rechargermag.com/articles/35828/ Standard 19752:2004 Table]
* [http://www.hp.com/sbso/product/supplies/whybuy_iso.html Measuring yield]
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