FAQ on Testing & Measurement Standard
Q1) How is the cartridge been measured and tested?
A1) Currently the Original Manufacturer like Canon, Epson, HP, Lexmark and others are using ISO / IEC FCD 24711 & 24712 derive in 2006 as the Testing and Measurement Standard criteria. Like:
1. Test conducted on at least 3 printer models with each model using 3 cartridges on each printer excluding the first cartridge been installed.
2. A suite of 5 patterns is printed continuously in consecutive order till the cartridge indicated empty by the program and unable to proceed further.
3. Test is conducted in a controlled temperature and Default mode of using plain paper with print command from a late PC model with a Microsoft Window Operating System.
4. The declare yield are round down instead of round up that are at least sufficient to meet and fulfill the international standard of deviation set by ISO to foster the accuracy and reliability.
Above information are extracted from the Epson web URL dated 21 October 2008: http://www.epson.com.sg/products/printers/iso_yield_testing.shtml
From the Epson website Newsroom Archive dated 16 June 2004, Title: Canon, Epson, HP and Lexmark, support new ISO Standard that helps customers evaluate Printer and Print Cartridge yield. Extracted from the web URL (Dated 21 October 2008) : http://www.epson.co.jp/e/newsroom/news_2004_06_16.htm
The Technically robust Testing criteria are (Quoted and extracted from the message):
1. Standard Test Document – as per market standard and availability.
2. Number of Cartridge Tested – Minimum 9 cartridges till they stop printing.
3. Sources of Cartridge – directly from the open market availability.
4. Clear, Objective, End-of-Life Criteria – Determine cartridge yield through measurements that established end-of-life criterion.
5. Number of Printers – A minimum of three cartridges is tested on three different printers to avoid bias due to printer variability.
6. Controlled Environment – Printing environment is controlled and consistent because temperature and humidity variation affects yield.
7. Objectivity – because World wide and Industry-wide participation, the testing criteria reflected objectivity in developing a reliable and rigorous standard.
Q2) What are the past methods of Testing and Measurement Standard (Before 2006)?
A2) From the past various Original Manufacturers’ criteria gathered from the web are as follow:
1. Canon – Using ISO JIS-SCID No 5 pattern as standard with plain paper mode.
2. Epson – Using ISO / IEC 10561 and ECMA standard.
3. HP – Using ISO 534 and 536 Standard.
These indicate that in the past every manufacturer use their own method of testing to suit their quality standard. It unable to differentiate and judge who has a better result in comparison as the test was not comparing Apple to Apple.
Currently all the manufacturers are using ISO as standardization like:
Brother - http://pub.brother.com/pub/com/iso_yield/ink_24711/declared_page_yield_iso24711_en.pdf dated 21 October 2008.
Canon - http://www.canon-europe.com/ink/Yield/Methodology/index.asp dated 21 October 2008.
Epson - http://www.epson.com.au/news/technologynews/inkyields_methodology.html dated 21 October 2008.
Q4) Why some Residual Ink left behind and cannot be used totally and completely?
A4) The threshold level is set and control by the program written by the printer manufacturer. Quoted "Understand from consumer point of view that this is a technological disadvantage but it can be a technological advantage as it helps to protect the print head from been dried as most of the consumer does not replace the cartridge immediately once the printer stop printing. While the Chip set on the cartridge is used to determine the ink level only. The stoppage of printing and to indicate the cartridge is empty is control by the printer software program".
Translated from the Press release dated 18 July 2003 which was extracted from the Epson website URL: http://www.epson.co.jp/e/newsroom/news_2003_07_18.htm (dated 21 October 2008), extracted from the Title : "Advice against Epson’s Inkjet Printer Called off"
There was an article shown on the web by “The Register” under the title: “Epson, we have a problem, Dutch urge inkjet boycott.” By Jan Libbenga, Posted in Personal, 8th July 2003 12:30 GMT. The information shown below (Quoted):
“The chip doesn't indicate the amount of ink left in the cartridge, the association claims, but stops after a number of print runs, even when there is enough ink available for another fifty pages or so.”
Extracted from the web at URL (dated 21 October 2008): http://www.theregister.co.uk/2003/07/08/epson_we_have_a_problem/
Whereas Brother’s FAQ website stated, "Why does the LCD on my Machine say "Ink Empty" when there are still ink remaining" at URL (dated 21 October 2008): http://welcome.solutions.brother.com/BSC/public/as/sg/en/faq/faq/000000/002000/000020/faq002020_000.html?reg=as&c=sg&lang=en&prod=dcp110c_eu_as&Cat=16
Since the Printer Manufacturer writes the program and set the threshold level. It has nothing to do and/or related to Nippon-ink cartridge and it beyond Nippon-ink control.
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