Methods and systems for ascertaining the roughness of a print media surface are described. In one embodiment, a print media roughness detection mechanism comprises a surface-engaging member that is configured to physically engage a print media surface. A reflective member is provided and is joined with...http://www.google.com/patents/US6629452?utm_source=gb-gplus-sharePatent US6629452 - Methods and systems for ascertaining the roughness of a print media surface
