Scheduling Calibration - Xerox Digital copier printers User Manual

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6-3 Understanding calibration
• DIC—Japanese press standard.
• Euroscale—European press standard.
• Linear—Results in output that divides the maximum measured density for each
color into equal density steps to provide an even distribution of tones over the
copier's density range. When you linearize the Fiery SI, the entire measured density
range in each color channel is divided into equal steps. Equal steps in ink percentage,
such as 0%, 10%, and 20%, are printed in equal steps in density, and appear as
roughly equal visual steps. This gives a linear response using the range of densities
available.
• SWOP-Coated—US press standard.

Scheduling calibration

In general, you should calibrate the Fiery SI at least once a week. If it is very important
to maintain consistent colors, or if your Fiery SI is subject to wide fluctuations in
temperature or humidity, you should calibrate every few hours. In general, to get the
best performance from your copier, calibrate whenever there is a noticeable change in
print quality.
If you need to split a print job into two or more batches, it is especially important to
calibrate before printing each batch.
You should also calibrate your Fiery SI system after copier maintenance. However,
because your copier may be unstable immediately after maintenance, you should wait
until you have printed approximately 50 pages before you calibrate.
Copier output is very sensitive to changes in temperature and humidity. To
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minimize these effects, your copier should not be installed near a window or in direct
sunlight, or near a heater or air conditioner.
Your copier may have a self-calibration feature that optimizes toner densities after
scanning a test page on the copier glass or some other method. You can use this feature
in conjunction with Fiery SI calibration. Always run the copier's self-calibration
routine before calibrating. Using the copier's calibration feature alone will not
necessarily bring output densities from your copier to the optimal values for Fiery SI
printing.