HP Deskjet 6500 Printer series - (Windows) User's Guide

For more information, see two-sided printing.
Only one side of the page prints when the two-sided printing option is
enabled
Verify that the following conditions exist:
The correct print options are set in both the printer software and the software
program that you are using.
The photo paper is not curled, if you are printing on two-sided photo paper.
Photo paper should be flat before printing. See storing and handling photo
paper for more information.
The media type and size that is selected on the Paper/Quality tab are supported
by the duplexer.
See the documentation that came with the duplexer for a list of supported media
types and sizes.
If the media type or size is not supported by the duplexer, you can print the
document by using the manual two-sided printing instructions.
Note: Do not try to print a two-sided document on single-sided paper, such
as single-sided photo paper.
Colors look faded
If the colors look faded, trying printing the two-sided document by using the manual
two-sided printing instructions.
10.3.6 Auto Two-Sided Print Accessory with Small Paper Tray
specifications
Dimensions when attached to printer
219.3 mm (8.63 in) tall x 320.5 mm (12.62 in) wide x 142.1 mm (5.6 in) deep
Duplexing specifications
For duplexing specifications, including skew, media weight, and media sizes for
paper fed into the printer through the printer In tray, see the Automatic Two-Sided
Printing Accessory specifications.
Small paper tray specifications
Media thickness: 7-12 mils
Media sizes:
HP Deskjet 6500 series printers
188