HP LaserJet Printers - Print Media Guide

Table 3-5 Gray areas on envelopes: causes and corrective actions
Cause Actions
Envelope has seams or multiple layers. Avoid printing over seams or other multiple-layer areas.
The toner density setting is too light. Reduce background (gray shading in non-imaged areas) by
adjusting the toner density setting to a darker setting. See the
documentation that came with your printer.
Wrinkles on envelopes
Wrinkles that form on envelopes after printing have several possible causes and can be corrected by following
the suggested actions.
Table 3-6 Wrinkles on envelopes: causes and corrective actions
Cause Actions
Loose envelope construction. Try dierent envelopes that are better constructed. See Envelope
construction on page 14 for characteristics of good envelope
construction.
Folds are not sharply creased. Try dierent envelopes that are better constructed. See Envelope
construction on page 14 for characteristics of good envelope
construction.
Low-weight/low-strength paper used in the envelope construction. Try dierent envelopes that are better constructed. See Envelope
construction on page 14 for characteristics of good envelope
construction.
High moisture content. You might need to acclimate the envelope from the storage
environment to your environment in order to diminish dierences in
heat and moisture. See Preparing print media for use on page 4.
Print-quality problems
Print-quality problems can be caused by the print media. Use this information to troubleshoot the problems.
Background toner particles
If the amount of background particles becomes unacceptable, the following procedures might help to clear the
condition:
● Increase the toner density setting. This decreases the amount of background particles.
● Change the paper to a lighter basis weight.
● Check the printer’s environment. Very dry (low humidity) conditions can increase the amount of background
particles.
Dropouts
If faded-out areas or character voids (partial print) occur randomly on the page:
● The moisture content of the paper might be uneven, or the paper might have moist spots on its surface as
a result of environmental humidity. Store the paper in a moisture-proof container. Try removing the top few
32 Chapter 3 Troubleshooting print media problems ENWW