How Calibration Works - EFI KM-C1530 Color Manual

2
2-3 Understanding calibration
• Achieve better color matches when reproducing
colors or other
• Optimize the Fiery X3e for using ColorWise rendering styles (CRDs) and CMYK
simulations, and for using ICC profiles.

How calibration works

Success in obtaining satisfactory print quality from the Fiery X3e depends on many
factors. Among the most important are establishing and maintaining optimal toner
densities. The
regulating toner densities, you obtain consistent printed color.
Even with a calibrated system, toner density is affected by service settings, humidity,
and temperature; density also tends to drift over time. Regular measurement detects
day-to-day variations in densities, and calibration corrects for them.
Calibration works by creating calibration curves on the Fiery X3e that compensate for
the difference between actual (measured) and desired (target) density values. These
calibration curves are the graphic equivalent of transfer functions, which are
mathematical descriptions of changes that will be made to the initial data. Transfer
functions are often graphed as input or output curves.
The Fiery X3e generates calibration curves after comparing measured values to the
final target values for each of the four toner colors. The target values are based on the
output profile specified.
Measurements
Measurement files contain numerical values that correspond to the toner density
produced by the copier when it prints solid cyan, magenta, yellow, and black, and
graduated tints of those colors.
To create a measurement file, print a page of color patches. Then measure the patches
using either a color measurement instrument connected to a computer on the network
or, if it is available, the print device's scanner. The new measurements are automatically
downloaded to the Fiery X3e.
named color systems.
density is the measure of the light absorbed by a surface. By carefully
spot colors, such as PANTONE