Hi jessica steele,
Thank you for using the Xerox forum.
I would suggest that you review the following solution which provides the limits and suggestions for supported paper types..
Solution : Paper and Paper Tray Specifications
http://www.support.xerox.com/support/770_DCP/support/en_US.html?objGUID=1024
Hopefully that answers your question,but you can aslo inquire using our online feature "Contact an experienced service technician" at the following link Fast Track to the Expert .