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HP LaserJet 4050 Family Printers - Paper Specifications

Use the information below to find the type of paper that performs best with your printer. For additional information about paper, see the User's Guide that came with your printer.

Selecting paper

Paper to use

For best results, use conventional 75 g/m sq. (20 lb) paper. Make sure that the paper is of good quality, and free of cuts, nicks, tears, spots, loose particles, dust, wrinkles, voids, and curled or bent edges. If unsure what type of paper you are loading (such as bond or recycled), check the label on the package of paper.

Paper to avoid

  • Paper with cutouts or perforations

  • Damaged, wrinkled, or irregularly shaped paper

  • Paper with glossy, smooth, or extremely rough surfaces

  • Heavily textured paper and embossed paper

  • Carbonless (NCR) or chemically coated paper

  • Paper and inks that are not compatible with the heat and pressure of fusing

Recycled paper

Recycled paper is a combination of waste paper, pre-consumer waste, and post-consumer waste. Printed waste paper is usually washed to remove most of the inks and other contaminants. A recycled sheet of paper may contain dark specks or appear gray or dirty. Select a recycled paper that meets the same specifications (except possibly brightness) as standard paper and that has a suitable appearance. HP recommends that recycled paper contain no more than 5 percent groundwood.

Colored paper

Use colored paper of the same high quality as white photocopy paper. Pigments used must withstand the printer's fusing temperatures of 200 degrees C (392 degrees F) for .1 seconds without deterioration. Do not use paper with a colored coating that was added after the paper was produced.

Archival paper

Paper used for archiving must meet the same media specifications as standard paper; however, the pH should be no less than 7.0. Some archival demands are more stringent than others, requiring the degree of alkalinity and chemical stability to be specified. Toner is chemically stable and should last as long as the paper does. Toner can be degraded by petroleum-based solvents and plasticizers, such as those found in vinyl folders. Avoid folding archival documents across printed areas or handling them roughly. Discuss archival requirements with the paper supplier.

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Paper basis weights and sizes

Basis weight is an important characteristic to consider, because paper that is too light or too heavy can cause misfeeds, mis-stacking, paper jams, and excessive mechanical wear. The following table lists the minimum and maximum sizes and weights allowed for each tray.

NOTE: Capacity may vary, depending on paper weight and thickness, and environmental conditions.

Tray 1

Tray
Dimensions
Weight
Capacity
Minimum Size
76 x 127 mm
(3 x 5 inches)
50 to 199 g/m sq.
(16 to 53 lbs)
100 sheets of 75 g/m sq. (20 lbs) paper
Maximum Size
216 x 356 mm (8.5 x 14 inches)
Transparencies
Same as minimum and maximum paper sizes listed above.
Thickness: 0.099 to 0.114 mm
(0.0039 to 0.0045 inches)
75 transparencies
Labels
Thickness: 0.127 to 0.178 mm
(0.005 to 0.007 inches)
50 labels
Envelopes
75 to 105 g/m
sq. (20 to 28 lbs)
10 envelopes
NOTE: Capacity may vary, depending on paper weight and thickness, and environmental conditions.

Trays 2 and 3 (HP LaserJet 4050 T and 4050 TN printers)

Tray
Dimensions
Weight
Capacity
Letter
216 x 279 mm
(8.5 x 11 inches)
60 to 105 g/m sq.
(16 to 28 lbs)
250 sheets of 75 g/m sq.
(20 lbs) paper 50 to 100 transparencies
A4
210 x 297 mm
(8.3 x 11.7 inches)
Executive
191 x 267 mm
(7.3 x 10.5 inches)
Legal
216 x 356 mm
(8.5 x 14 inches)
B5 (ISO) (custom)
176 x 250 mm
(6.9 x 9.9 inches)
B5 (JIS)
182 x 257 mm (7.2 x 10 inches)
A5 (custom)
148 x 210 mm (5.8 x 8.2 inches)
NOTE: Capacity may vary, depending on paper weight and thickness, and environmental conditions.

Tray 2 (HP LaserJet 4050, 4050N printers)

Tray
Dimensions
Weight
Capacity
Letter
216 x 279 mm
(8.5 x 11 inches)
60 to 105 g/m sq.
(16 to 28 lbs)
500 sheets of 75 g/m sq.
(20 lb.) paper 50 to 100 transparencies
A4
210 x 297 mm
(8.3 x 11.7 inches)
Legal
216 x 356 mm
(8.5 x 14 inches)
NOTE: Capacity may vary, depending on paper weight and thickness, and environmental.

Optional 500-sheet tray

Tray
Dimensions
Weight
Capacity
Letter
216 x 279 mm
(8.5 x 11 inches)
60 to 105 g/m sq.
(16 to 28 lbs)
500 sheets of 75 g/m sq.
(20 lb.) paper 50 to 100 transparencies
A4
210 x 297 mm
(8.3 x 11.7 inches)
Executive
191 x 267 mm
(7.3 x 10.5 inches)
Executive (JIS) (custom)
216 x 330 mm
(8.5 x 13 inches)
16 K (custom)
197 x 273 mm
(7.75 x 10.75 inches)
Legal
216 x 356 mm
(8.5 x 14 inches)
B5 (ISO) (custom)
176 x 250 mm
(6.9 x 9.9 inches)
B5 (JIS)
182 x 257 mm
(7.2 x 10 inches)
A5 (custom)
148 x 210 mm
(5.8 x 8.2 inches)
Custom
148 x 210 mm to 216 x 256 mm
(5.8 x 8.2 inches to 8.5 x 14 inches)
NOTE: Capacity may vary, depending on paper weight and thickness, and environmental conditions.

Optional envelope feeder

Accessory
Dimensions
Weight
Capacity
Minimum Size (NOTE : Envelope size range is applicable to standard-sized envelopes. The optional envelope feeder does not support custom-sized envelopes)
90 x 160 mm
(3.5 x 6.3 inches)
75 to 105 g/m sq.
(20 to 28 lbs)
75 envelopes
Maximum Size
178 x 254 mm
(7 x 10 inches)

Optional duplexer

Accessory
Dimensions
Weight
Capacity
Letter
216 x 279 mm (8.5 x 11 inches)
60 to 105 g/m sq. (16 to 28 lb.)
not applicable
A4
210 x 297 mm
(8.3 x 11.7 inches)
Executive
191 x 267 mm
(7.3 x 10.5 inches)
Legal
216 x 356 mm
(8.5 x 14 inches)
B5 (JIS)
182 x 257 mm
(7.2 x 10 inches)

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Paper specifications

The following table summarizes the specifications of paper that will give the best performance.

Category
Specification
Grain
Long
Moisture Content
4.7% +/- 1% by weight
Composition/Finish
100% Chemical wood pulp and/or cotton.
Recycled paper with up to 5% groundwood may be used.
Acid Content
5.5 pH minimum
Ash Content
Not to exceed 10%
Opacity
85% minimum
Brightness
83% minimum (recycled paper may not be as bright)
Caliper
3.0 - 7.0 mils (0.094 to 0.18 mm)
Curl
In ream: flat within 0.2 inch (5 mm)
Cut Edge
Sharp/no fray, no dust.
Finishing
Cut sheet to +/- 0.8 mm (+/- 0.03 inch) of nominal and +/- 0.2 degrees square
Fusing Compatibility
Must not scorch, melt, offset, or release harmful emissions at 200 degrees C (392 degrees F) for .1 second (0.2 seconds for the HP Color LaserJet printer).
Packaging
Polylaminated moisture-proof ream wrap
Smoothness
100-250 Sheffield (rougher surfaces tend to reduce image quality) 100-190 Sheffield for the HP Color LaserJet printer
Stiffness
1.6 minimum machine direction; 0.6 minimum cross direction (Taber)
Surface Strength
12 minimum wax pick (Dennison)
Electrical Surface
2.0 to 15 x 10 (to the 10th power)
Resistivity
ohms/sq (conditioned at 23 degrees C and 50% relative humidity)
Electrical Volume
1.2 to 15 x 10 ( to the 11th power) ohms x
Resistivity
cm (conditioned at 23 degrees C and 50% relative humidity)

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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, 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 paper 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 three months). Paper stored for long periods may 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 printer performance. The required condition is 20 degrees to 24 degrees C (68 degrees to 75 degrees F), with a relative humidity of 45% to 55%. The following guidelines should be helpful when evaluating the paper's storage environment:

  • Paper should be stored at or near room temperature.

  • The air should not be too dry or too humid (due to the hygroscopic properties of paper).

  • The best way to store an opened ream of paper is to rewrap it tightly in its moisture-proof wrapping. If the printer environment is subject to extremes, only unwrap the amount of paper that is to be used during the day's operation to prevent unwanted moisture changes.

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