HP Indigo 7500 Smoothness improvement for photo applications-- CA393-09820 Rev - Page 4

Procedures, Preparation, Reducing single-dot size (Press

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2 Procedures Procedures to improve smoothness for professional photo applications Preparation Follow these steps for preparation of a job. 1. As reference, print a customer job that shows the problem. 2. Verify that all the maintenance routines (daily, weekly and monthly) have been performed; complete them if necessary. 3. Print Gray 20 - 4 colors with HDI 180. ● Fix any PQ issue (banding, screens artifacts, WH issues, etc.). ● If there is random colorful banding - fix with the Magenta Blush troubleshooting procedure. Figure 2-1 Example of colorful banding 4. Run CPR (color plane registration) calibration and validate that CPR is good. Reducing single-dot size (Press) Reduce single-dot size. Perform the following steps on the press: 1. Copy the following 4 ink files to the C:/Unicorn/inks folder: ● US-Cyan-EIM4_5_DA30.usi ● US-Magenta-EIM4_5_DA30.usi ● US-Yellow-EIM4_5_DA30.usi 2 Chapter 2 Procedures

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Procedures
2
Procedures to improve smoothness for professional photo applications
Preparation
Follow these steps for preparation of a job.
1.
As reference, print a customer job that shows the problem.
2.
Verify that all the maintenance routines (daily, weekly and monthly) have been performed; complete
them if necessary.
3.
Print Gray 20 – 4 colors with HDI 180.
●
Fix any PQ issue (banding, screens artifacts, WH issues, etc.).
●
If there is random colorful banding – fix with the Magenta Blush troubleshooting procedure.
Figure 2-1
Example of colorful banding
4.
Run CPR (color plane registration) calibration and validate that CPR is good.
Reducing single-dot size (Press)
Reduce single-dot size.
Perform the following steps on the press:
1.
Copy the following 4 ink files to the
C:/Unicorn/inks
folder:
●
US-Cyan-EIM4_5_DA30.usi
●
US-Magenta-EIM4_5_DA30.usi
●
US-Yellow-EIM4_5_DA30.usi
2
Chapter 2
Procedures