Media specifications
For complete media specifications for all HP LaserJet printers and MFPs, see the HP LaserJet
Printer Family Print Media Guide (available at
www.hp.com/support/ljpaperguide).
Category Specifications
Acid content 5.5 pH to 8.0 pH
Caliper 0.094 to 0.18 mm (3.0 to 7.0 mils)
Curl in ream Flat within 5 mm (0.02 inch)
Cut edge conditions Cut with sharp blades that create no visible fray
Fusing compatibility Must not scorch, melt, offset, or release hazardous
emissions when heated to 200°C (392°F) for 0.1 second
Grain Long grain
Moisture content 3% to 9% by weight
Smoothness 100 to 250 Sheffield
Printing and paper-storage environment
Ideally, the printing and paper-storage environment should be at or near room temperature, and not
too dry or too humid. Remember that paper is hygroscopic; it absorbs and loses moisture rapidly.
Heat works with humidity to damage paper. Heat causes the moisture in paper to evaporate, while
cold causes it to condense on the sheets. Heating systems and air conditioners remove most of the
humidity from a room. As paper is opened and used, it loses moisture, causing streaks and
smudging. Humid weather or water coolers can cause the humidity to increase in a room. As paper is
opened and used it absorbs any excess moisture, causing light print and dropouts. Also, as paper
loses and gains moisture it can distort. This can cause jams.
As a result, paper storage and handling are as important as the paper-making process itself. Paper
storage environmental conditions directly affect the feed operation.
Care should be taken not to purchase more paper than can be easily used in a short time (about
3 months). Paper stored for long periods might experience heat and moisture extremes, which can
cause damage. Planning is important to prevent damage to a large supply of paper.
Unopened paper in sealed reams can remain stable for several months before use. Opened
packages of paper have more potential for environmental damage, especially if they are not wrapped
with a moisture-proof barrier.
The paper storage environment should be properly maintained to ensure optimum MFP
performance. The required condition is 20° to 24°C (68° to 75°F), with a relative humidity of
Media specifications 19
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