Xerox P8EX Spire CXP8000 Color Server - User Guide - Page 318

304 Calibration Chapter 7 - Color Workflow One of the most important issues in obtaining satisfactory print quality is steady toner density. Toner density is affected by many factors such as heat, humidity and service settings. You should perform a daily calibration to compensate for these factors. The calibration process corrects the printer colors by measuring their density and creating calibration look-up tables. The Spire CXP8000 color server uses the data in these tables to compensate for the differences between the actual, measured density level and the target level, the target density. You should perform calibration in the following instances: • When you use a new paper stock • When you use a different screening method • At least once every eight hour shift for every combination of paper stock and screening method used • When prints show "color casts" • After machine maintenance or hardware changes-for example, replacing a "Charge Coroton" • On drastic ambient changes (temperature and humidity) Important: Perform a different calibration for every combination of media and screen type you are going to use for printing. When calibrating, always use the same media that you intend to use for printing. Tip: You can set a reminder to remind you to calibrate the Xerox DocuColor 8000 Digital Color Press. For more information, see Calibration Reminder on page 415.