HP Scitex LX600 HP Scitex LX Printer Family - Maintenance and troubleshooting - Page 19

Color profiles, Dynamic color registration, The problem: color misregistration

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Color profiles Color calibration provides consistent colors, but consistent colors are not necessarily accurate. For instance, if your printer prints all colors as black, its colors may be consistent but they are not accurate. In order to print accurate colors, it is necessary to convert the color values in your files to the color values that will produce the correct colors from your printer, your inks and your substrate. An ICC color profile is a description of a printer, ink and substrate combination that contains all the information needed for these color conversions. These color conversions are performed by your Raster Image Processor (RIP), not by the printer. For further information on the use of ICC profiles, see the documentation for your application software and for your RIP. Dynamic color registration If your substrate expands or shrinks due to the heat applied in the printing process, you may notice some color misregistration in your prints. You can reduce this problem using dynamic color registration, as follows: 1. Print a test pattern from the HP Internal Print Server. 2. Select settings to correct the error in the HP Internal Print Server. Consider performing dynamic color registration in the following cases: ● When you notice color misregistration in your prints ● When you use a substrate type for the first time ● After replacing a printhead and aligning the printheads The problem: color misregistration Color misregistration means that colors are horizontally misaligned, in the direction of the carriage, towards the center of the substrate. The misregistration is different on each side of the roll, and cannot be corrected by printhead alignment. The examples shown here are magenta and black, because they are the most visible, but misregistration can also occur with the other color pairs: magenta and cyan, yellow and black, yellow and cyan. Printer calibration This issue does not occur with every substrate. If you see the same misregistration across the width of the roll, use printhead alignment instead. ENWW Color profiles 13

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Color profiles
Color calibration provides consistent colors, but consistent colors are not necessarily accurate. For
instance, if your printer prints all colors as black, its colors may be consistent but they are not
accurate.
In order to print accurate colors, it is necessary to convert the color values in your files to the color
values that will produce the correct colors from your printer, your inks and your substrate. An ICC
color profile is a description of a printer, ink and substrate combination that contains all the
information needed for these color conversions.
These color conversions are performed by your Raster Image Processor (RIP), not by the printer. For
further information on the use of ICC profiles, see the documentation for your application software
and for your RIP.
Dynamic color registration
If your substrate expands or shrinks due to the heat applied in the printing process, you may notice
some color misregistration in your prints. You can reduce this problem using dynamic color
registration, as follows:
1.
Print a test pattern from the HP Internal Print Server.
2.
Select settings to correct the error in the HP Internal Print Server.
Consider performing dynamic color registration in the following cases:
●
When you notice color misregistration in your prints
●
When you use a substrate type for the first time
●
After replacing a printhead and aligning the printheads
The problem: color misregistration
Color misregistration means that colors are horizontally misaligned, in the direction of the carriage,
towards the center of the substrate. The misregistration is different on each side of the roll, and
cannot be corrected by printhead alignment. The examples shown here are magenta and black,
because they are the most visible, but misregistration can also occur with the other color pairs:
magenta and cyan, yellow and black, yellow and cyan.
This issue does not occur with every substrate. If you see the same misregistration across the width
of the roll, use printhead alignment instead.
ENWW
Color profiles
13
Printer calibration