Specifications

CALIBRATION 56
Understanding calibration
Calibration generates adjustments to dry ink densities that account for the difference between
the actual dry ink densities (measurements) and the expected response (target).
• Measurements represent the actual color behavior of the digital press.
• Calibration settings contain sets of measurements that represent the output for specific
printing conditions, such as media and print options.
• Each calibration setting is associated with a calibration target that describes the expected
behavior of the digital press.
After you calibrate the EX700i for a specific calibration setting, the measurements are stored.
These measurements are used to adjust output densities when you print with the output
profile associated with the calibration setting.
Every output profile has an associated calibration setting. If you have not specified one, the
calibration setting associated with the default output profile is used.
If you update the calibration for a job after the job has been processed, you do not have to
process the job again. The new calibration affects the job without reprocessing.
How calibration works
Although the needs of most users are met by the default calibration setting, the EX700i allows
you to choose a calibration setting to customize calibration for specialized jobs.
Calibration allows you to:
• Maximize the color reproduction capabilities of the EX700i.
• Ensure consistent color quality over time.
• Produce consistent output across EX700i servers.
• Achieve better color matches when reproducing spot colors, such as PANTONE colors or
other named color systems.
• Optimize the EX700i for using ColorWise rendering intents, CMYK simulations, and
ICC profiles.
Success in obtaining satisfactory print quality from the EX700i depends on many factors.
Among the most important are establishing and maintaining optimal dry ink densities. The
density is the measure of the light absorbed by a surface. By carefully regulating dry ink
densities, you obtain consistent printed color.
Even with a calibrated system, dry ink density is affected by the settings of digital press,
humidity, and temperature. Density also tends to drift over time. Uneven dry ink density on
paper affects calibration results. Regular measurement detects day-to-day variations in density,
gradation, and color reproduction, and calibration corrects them.