HP Scitex LX850 HP Scitex LX850 & LX820 Printers: Maintenance and troubles - Page 77

Colors are inaccurate, Colors shift unexpectedly, How to avoid Color Inconsistency

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Colors are inaccurate Print-quality issues 1. Check that the substrate has been correctly loaded. 2. Check that the loaded substrate is the same as the substrate selected in the HP Internal Print Server. 3. Check that the ICC profile used by the RIP is correct for the loaded substrate. 4. Ensure that you are printing bidirectionally. 5. Consider creating an ICC profile specific to the substrate you are using. Colors shift unexpectedly In certain colors and applications a certain amount of color shift can be observed especially between the right and left edge of an image. To prevent this use the following options: How to avoid Color Inconsistency In order to ensure overall Print Quality and in particular Color Consistency, is at an acceptable level check the following: 1. Make sure that all the calibrations below have been performed with good results: a. Printhead Alignment: Ensures color to color alignment and bidirectional alignment within a color. b. Substrate Advance Calibration: Check and corrects potential color plane misregistrations in the substrate axis. c. Color Calibration (CLC): Ensures linear tonal response as well as consistency between different printheads and printers. A separate Color Calibration is advised for each substrate but also when any given printhead is changed. To get an even better performance we recommend performing the Color Calibration frequently, depending on the printer's usage it can be scheduled weekly, every two weeks or longer according to your work flow. d. Dynamic Color Correction: Corrects the color plane misregistration that can be caused by the substrate deforming under heat. 2. Use of Bidirectional printmodes to minimize the tonal differences between the end and beginning of a swath. ENWW Colors are inaccurate 71

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Colors are inaccurate
1.
Check that the substrate has been correctly loaded.
2.
Check that the loaded substrate is the same as the substrate selected in the HP Internal Print
Server.
3.
Check that the ICC profile used by the RIP is correct for the loaded substrate.
4.
Ensure that you are printing bidirectionally.
5.
Consider creating an ICC profile specific to the substrate you are using.
Colors shift unexpectedly
In certain colors and applications a certain amount of color shift can be observed especially between
the right and left edge of an image. To prevent this use the following options:
How to avoid Color Inconsistency
In order to ensure overall Print Quality and in particular Color Consistency, is at an acceptable level
check the following:
1.
Make sure that all the calibrations below have been performed with good results:
a.
Printhead Alignment:
Ensures color to color alignment and bidirectional alignment within
a color.
b.
Substrate Advance Calibration:
Check and corrects potential color plane
misregistrations in the substrate axis.
c.
Color Calibration (CLC):
Ensures linear tonal response as well as consistency between
different printheads and printers. A separate Color Calibration is advised for each substrate
but also when any given printhead is changed. To get an even better performance we
recommend performing the Color Calibration frequently, depending on the printer's usage it
can be scheduled weekly, every two weeks or longer according to your work flow.
d.
Dynamic Color Correction:
Corrects the color plane misregistration that can be caused
by the substrate deforming under heat.
2.
Use of Bidirectional printmodes to minimize the tonal differences between the end and beginning
of a swath.
ENWW
Colors are inaccurate
71
Print-quality issues