ISO Standard Speed for Inkjet Printers
The International Organization for Standardization is a network of national standard institutes from 157 countries around the globe that develops and publishes international standards for products and services. These standards are implemented to ensure that products are reliable, interchangeable and available at a low cost to consumers. ISO standards ensure that products maintain a level of quality and reliability that may be lost as companies attempt to create products at a lower cost. The printing speed of an inkjet printer is tested according to the organization's guidelines and is advertised as the printer's page-per-minute speed or PPM.
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Inkjet Speed
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The international standard for measuring inkjet productivity and copy speed is called ISO/IEC 24734 and ISO/IEC 24735. The standard is used by consumers to compare printers made by different companies in order to determine which one meets their printing needs. Ink coverage for tests is around 11 percent of the printed area, minus the margins, on a piece of paper. The standard inkjet printing speed is calculated using documents from Adobe Reader, Microsoft Excel and Microsoft Word.
PPM
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Printer productivity or PPM is measured by timing how fast and efficiently an inkjet can print one plain, 8.5 by 11-inch or A4 letter size piece of normal weight paper. ISO testing of an inkjet printer is done by continuously printing of a single test page over a period of time. Test pages can be in color or printed with black ink only.
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Timing PPM
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The printer is placed on the factory default paper setting and a four-page test file is set to the printer by a computer. Timing the inkjet printer speed is done with three criteria: First Set Out Time, Effective Throughput and Estimated Saturated Throughput. The timing test is done by printing a single side of the page, or if the printer has an automatic collating setting, the test pages are printed on both sides.
FSOT
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During timing of FSOT, the test print begins when the computer sends the file to the printer and ends when the fourth page of the first set of the file is done printing. FSOT is done to time short jobs, or one set of a four-page file.
EFTP
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Timing EFTP is starts when the print job is sent to the printer and ends when the last page of the job is done printing. EFTP is used to time short jobs; medium jobs or one set of a four-page file, plus 30 seconds more of additional printing; and long jobs, or one set of an Adobe Reader four-page file plus four minutes of additional printing.
ESAT
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ESAT is measured starting when the fourth page of the first set of the four-page file is printed and ends when the last page lands in the printer's paper tray. This timing method is done on medium printing jobs.
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References
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