EFI Fiery ES IC-418, Конфигурация и настройка, Страница: 199 / 243

Understanding calibration
Calibration generates adjustments to ink or toner densities that account for the difference between the actual
densities (measurements) and the expected response (target).
•
Measurements represent the actual color behavior of the printer.
•
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 printer.
After you calibrate the Fiery ES 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.
Although the needs of most users are met by the default calibration setting, the Fiery ES allows you to select a
calibration setting to customize calibration for specialized jobs.
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.
How calibration works
Success in obtaining satisfactory print quality from the Fiery ES depends on many factors. Among the most
important are establishing and maintaining optimal ink or toner densities. The density is the measure of the light
absorbed by a surface. By carefully regulating densities, you obtain consistent printed color from print run to print
run.
Calibration allows you to:
•
Maximize the color reproduction capabilities of the Fiery ES.
•
Ensure consistent color quality from print run to print run.
•
Produce consistent output across more than one Fiery ES.
•
Achieve better color matches when reproducing spot colors, such as PANTONE colors or other named color
systems.
•
Optimize the Fiery ES for using ColorWise rendering intents, CMYK simulations, and ICC profiles.
Even with a calibrated system, ink or toner density is affected by the settings of the printer, humidity, and
temperature. Density also tends to drift over time. Uneven density on paper affects calibration results. Regular
measurement detects day-to-day variations in density, gradation, and color reproduction, and calibration corrects
them.
Calibration works by calculating adjustments that compensate for the difference between actual (measured) and
desired (target) density values. These calibration adjustments are often depicted as mathematical curves for each of
the colorants.
When to calibrate
Calibrate the Fiery ES at least once a day, depending on the volume of print jobs. If it is very important to maintain
consistent color, or your printer is subject to wide fluctuations in temperature or humidity, calibrate every few hours.
Color Printing
Calibration
35