Substrate Independent Color Printing
Original Publication Date: 1979-Jan-01
Included in the Prior Art Database: 2005-Feb-19
Substrates such as paper for color printing vary in color, composition, and surface treatment, and, consequently, printed color, as perceived by the eye, varies from material to material. To provide true color reproduction on various substrates, a pre-printing calibration run can determine and store hue-correction data for the current support material. For example, in the context of a color copying machine which scans an original document for reproduction, a calibration mode consists of the following steps. 1. Either an actual first copy of the original document is made or small patches of the three primary colors are printed on the substrate of interest. 2. The test document thus created is scanned by placing it on the document window or by having an appropriate calibration station in the paper path. 3.