Epson Stylus Pro 4900/Epson Stylus Pro 4910 Revision A
ADJUSTMENT Head Related Checks and Adjustments 342
Confidential
4.11.6 Colorimetric Calibration (Color ID)
with SpectroProofer
4.11.6.1 Adjustment Overview
This adjustment is required when the user asks to reduce the color gap between the
printers after replacing any of the following parts.
Printhead
Main Board
Power Supply Board Assy
PURPOSE
By registering/controlling information concerning the ink droplets, this product
improves calibration accuracy and ensures stable color quality. (Difference in color
among individual products or each mode is reduced.)
PRINCIPLE
The calibration is performed by measuring a printed correction pattern with a
calibrator. ID information that is calculated based on the acquired color values (L*, a*,
b*) is transmitted to the printer driver, and the printer driver corrects the dot generation
amount for each dot size x each color in the print data.
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