how to modify print--mail--node--node-type.tpl.php drupal 7x
I think that you can do this by changing display of content type. Just go to the Manage display page of the content type you print; at the bottom, expand Custom display settings and select Print. After saving, you'll see the Print tab (next to tabs like Default and Teaser).

Now you can change the page display settings. You can also change the page style using CSS.