HP LaserJet Enterprise M4555 MFP Series - Software Technical Reference

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Envelope C5
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Envelope C6
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Envelope DL
Print on both sides automatically
The product duplexing unit prints on two sides of a sheet of paper when the Print on Both Sides
option is specified in the print job. The product comes with a duplexing unit installed in all models.
The smart duplexing feature increases printing performance by preventing one-page print jobs or single-
sided pages of a duplexed print job from going through the duplexing unit even when the duplexing
feature has been selected in the driver.
All paper types support the smart duplexing feature, except for paper types that cannot be printed on
both sides (such as labels, transparencies, and envelopes) and the following paper types:
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Prepunched
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Preprinted
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Letterhead
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Cardstock
When the paper type is set to Unspecified, the smart duplexing feature is disabled.
To achieve the best print quality when printing on the second side of the page, the product needs to
make adjustments to its print modes. When you select a paper type, you are, in effect, instructing the
product to use a group of settings (such as fuser temperature and print speed) to print the paper with
the best possible quality. This group of settings is known as print mode. A different print mode is used
with each paper type. Print-mode adjustments for the second side of a duplexed page are automatic.
Print on both sides manually
Select Print on Both Sides (Manually) for paper types that are not available when using the
automatic duplexing unit, such as cardstock and thick paper.
Manually printing on the second side of a page is available when you are using the HP PCL 6 printer
driver. If a duplexing unit is installed and manual duplexing is enabled in the driver, the product
automatically prints on both sides of paper types that are supported for automatic duplexing (Letter, A4,
Legal, and 8.5 x 11 only). For paper types that are not supported for automatic duplexing, a Help
message appears prompting you to configure the driver settings for manual printing on both sides.
Manual printing on both sides does not occur automatically.
Select the paper type that corresponds to the paper that you are using for the print job. The following
paper types have a different print mode when you manually print on the second side:
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Plain
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Preprinted
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Letterhead
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Prepunched
96 Chapter 4 HP PCL 6 printer driver for Windows ENWW