Xerox 2006NPC DocuColor 2006 User Guide - Page 375

20. Using ColorWise Pro Tools Measurements Measurement files contain numerical values that correspond to the toner density produced by the copiers when it prints solid cyan, magenta, yellow and black, and graduated tints of those colors. To create a measurement file, first print a page of color patches from ColorWise Pro Tools or from the Control Panel to the copier. Then measure the patches using either an X-Rite DTP32 densitometer connected to a computer on the network or the copier's scanner. The new measurements are automatically downloaded to the Fiery. Output profiles and calibration sets Output profiles and calibration sets define desired calibration results. One or more output profiles and one or more calibration sets are provided with the Fiery. When you calibrate the Fiery, you can select the calibration set that corresponds to the typical printing jobs at your site. This same calibration set can be associated with one or more output profiles. Scheduling Calibration In general, you should calibrate the Fiery at least once a day, depending on the volume of print jobs. If it is very important to maintain consistent color, or if the copier is subject to wide fluctuations in temperature or humidity, calibrate every few hours. To get the best performance, calibrate whenever there is a noticeable change in print quality. If you need to split a print job into two or more batches to be printed at different times, it is especially important to calibrate before printing each batch. You should also calibrate the Fiery after copier maintenance. However, because the copier may be less stable immediately after maintenance, wait until you have printed approximately 50 pages before you calibrate. Since printed output from the copier is very sensitive to changes in temperature and humidity, the copier should not be installed near a window or in direct sunlight, near a heater or air conditioner. Paper is sensitive to climate changes as well. It should be stored in a cool, dry, stable environment, and reams should remain sealed until they are needed. Print color reference pages, such as the Color Charts from the Control Panel, and the color reference pages included with the user software. All of these pages include fully saturated color patches and pale tints of cyan, magenta, yellow and black. Images with skin tones offer a very good basis for comparison. You can save and compare pages you printed at different times. If there is a noticeable change in appearance, you should calibrate the Fiery. If the solid density patches (100% cyan, magenta, yellow or black) look less saturated with time, show the pages to your copier service technician to find out whether adjusting the copier can improve output. Xerox DocuColor 2006 20-3