Xerox 2006NPC DocuColor 2006 User Guide - Page 374
Understanding Calibration, How Calibration Works
UPC - 042215475440
View all Xerox 2006NPC manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 374 highlights
20. Using ColorWise Pro Tools Changing calibration has the potential to affect all jobs for all users, so you may want to limit the number of people authorized to perform calibration. An Administrator password can be set from the Fiery Control Panel to control access to calibration. Understanding Calibration Although most users needs are met by the default calibration set, the Fiery allows you to choose a calibration set to customize calibration for specialized jobs. Calibration allows you to: • Maximize the color reproduction capabilities of the Fiery. • Ensure consistent color quality over time • Produce consistent output across Fiery servers that are connected to the same print engine. • Achieve better color matches when reproducing spot colors such as PANTONE colors or other named color systems. • Optimize the fiery for using ColorWise rendering styles (CRDs) and CMYK simulations, and for using ICC profiles. How Calibration Works Success in obtaining satisfactory print quality from a color server, such as a Fiery connected to a copier, depends on many factors. Among the most important are establishing and maintaining optimal toner densities. Density is a measure of the light absorbed by a surface. By carefully regulating toner densities, you can obtain consistent printed color. Even with a calibrated system, service settings, humidity, and temperature affect toner density. It also tends to drift over time. Regular measurement detects day to day variations in densities, and calibration corrects for them. Calibration works by creating calibration curves on the Fiery that compensate for the difference between actual (measured) and desired (target) density values. Calibration curves are the graphic equivalent of transfer functions, which are mathematical descriptions of changes that will be made to the data you start with. Transfer functions are often graphed as input or output curves. The Fiery generates calibration curves after comparing measured values to the final target values for each of the four toner colors. The target values are based on the output profile specified. 20-2 Xerox DocuColor 2006