HP 5550 User Guide - Page 142

Duplexing Select paper with high opacity for duplex (Double-Sided) printing. Opacity refers to how effectively paper blocks out what is written on the opposite side of the page. If the paper has low opacity (high translucency), then the printed data from one side of the page will show through to the other side. Check your application for margin information. For best results, print a small quantity to make sure the opacity is acceptable. Duplex (Double-Sided) printing can be done manually or can be done automatically with the duplex option installed and selected. Note Only plain paper, 60-90 g/m2 (16-24 lb bond) can be autoduplexed. See "Media Specifications" on page 100. Duplexing envelopes, labels, postcards, thick stock, glossy media or transparencies is not supported. How do I autoduplex? You should verify that the duplex option is physically installed on the printer to successfully duplex (Double-Sided) the job. Check your application to determine how to set your margins for duplex (Double-Sided) printing. The following Binding Position settings are available. If "Short Edge" is selected, the pages will be laid out to flip 11 at the top. 2 13 11 If "Long Edge" is selected, the pages will be laid out to flip at the side. 2 13 128 Duplexing