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Overview
HP Web Jetadmin offers various types of page counter columns to meet the needs of customers.
Impressions, sheets, and job type counters all provide value in distinctive areas of interest. More
users are printing in duplex mode as a consequence of Go Green/ecological sustainability. Sheet
counting methods are designed to enable efficient service and support by counting sheets as they
pass through the print engine. For duplex printing, sheet counting focuses more on paper and
duplexer usage rather than accuracy of toner usage. HP has developed an impression based
counting methodology in order to more accurately bill for toner usage. Impression counting is
standard on newer FutureSmart devices but can also be enabled on older devices to implement new
page counting methods that are more aligned with today’s job accounting needs.
Counting Impressions vs. Counting Sheets
HP printers have traditionally counted pages printed as sheets. Sheet counting can monitor paper
consumption and the physical wear and tear on the print engine components because every sheet that
passes through the print engine is counted. As one sheet (or one piece of media) passes through the
engine print cycle in simplex mode, it is counted as one simplex sheet. A simplex page is counted as
either one mono sheet or one color sheet depending on whether color toner was present on the sheet.
As one sheet passes through the engine print cycle in duplex mode, it is counted as one duplex sheet.
However, the most costly side of the usage is counted for a duplex page, which means that if color
exists only on one side of the duplex page, the printer meters two color pages. Blank sides of a
duplex page are counted as printed pages and are metered as the usage on the printed side. Duplex
1 Image page counts are incremented for the blank side of the last page of a duplex print job but are
not tracked as color or mono.
HP has developed firmware that implements an impression page counting method that is more
aligned with today’s job accounting needs. An impression is defined as a side of a page that
contains toner. Only the printed image is counted regardless of the number of sheets the print engine
processes. Impression counts eliminate the concept of duplex pages and separate the pairing of color
counts and duplex counts. Each side of a page is counted as an impression based upon whether
toner is on the page. An impression is color if color toner is used, otherwise the impression is mono.
Both color and mono are used for billing, but color is billed at a higher rate (because of the higher
cost) than mono. Under the new impression counting technique, toner usage is more accurately
metered.
Enabling Impressions
Newer HP FutureSmart models have values defined for both impressions and sheets, and these values
are defined for many different media sizes. These devices are set to impressions counts by default
and also provide the sheet counts needed to measure simplex and duplex values. No firmware
upgrades or settings changes are needed on FutureSmart and many other newer HP device models to
obtain impressions counting. This counting methodology is implemented as a base feature on these
devices.
On older devices, the impression based counting is an optional page counting feature that the device
owner or administrator can enable, if desired.
WARNING: If the new impression based counting method is enabled, the device cannot return to
the previous sheet-counting counting method.
If the feature is not enabled, nothing on the device changes and it continues to count pages as it did
when shipped from the factory (see the following behavior tables). Device administrators and product
owners should review the information in this document to make an informed decision about whether
they want to permanently enable the new counting behavior or stay with the original factory counting
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