HP Latex 1500 User guide - Page 153
Substrate, Color calibration, Show all, Default
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1. The color calibration test chart is printed, which contains patches of different densities of each ink used in your printer. 2. The test chart is scanned and color-measured using the embedded spectrophotometer. If the scan cannot be completed successfully, a message is displayed by the Internal Print Server; see Color calibration fails on page 414. 3. From the measurements made by the spectrophotometer, the printer calculates the necessary correction tables to apply to your print jobs for consistent color printing on that substrate type-except in the case of the first calibration, which sets the reference for later ones. Calibration should be done in any of the following circumstances: ● Whenever a new substrate type is introduced that has not yet been calibrated: to set the reference. ● Whenever you notice excessive color differences between prints. Such color differences can be caused by aging and wear of the printheads, installing new printheads, changes in substrate characteristics between one roll and another, changing environmental conditions, and so on. You can check the color calibration status of your substrates with the Internal Print Server: select Substrate > Color calibration > Show all. ● Default status indicates that this substrate has never been calibrated, and therefore no reference state is defined. ● Done status indicates that a color calibration has been performed successfully on this substrate, the reference state is defined and still up to date. ENWW Color calibration 145