Table of contents Troubleshoot Image Quality issues Colors shift unexpectedly ..................................................................................................................... 1 Blurred or defective areas on edges or lines ........................................................................................ 4 How to achieve better consistency between jobs of the same length ..................................................
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Troubleshoot Image Quality issues 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.
the file ‘spitBars_300_HR_1.TIFF’. Do NOT use the default spit bars from the RIP (accessible usually by just checking a box ‘spit bars’ as it will not print any Light Cyan, or Light magenta. NOTE: The recommended width of the Spit Bars is 3.5 cm (approximately 1.4”).
When performing ‘Nesting’ In some very extreme and specific cases, depending on how the plots are organized, you might see a color difference within one area fill, while there is no color difference within the original job. Here is an example of two plots nested: To solve the issue so that you cannot see the color shift in the middle of the job 1, you can reorganize the nesting (or do not do nesting).
this occurs and when printing a large area fill of mainly a single color, a color shift can be seen between the middle of the substrate and the side of the substrate. This could also happen when the advance is not perfect, but in this case, horizontal banding should be visible. To solve this, perform the best Dynamic Color Registration you can achieve refer to the Service Manual.
The objective is to make sure that there is no pause between the tiles. When using the Queue mode in the HP Internal Printer Server, there is still a small time between the jobs, which could add more variability between the lengths of the tiles. 4. In order to make sure that even the first tile has the less difference of length versus the other ones, add a top margin of 50 cm.
2. Select the file ‘Test1_temp_profile’. 3. Click on Open and set the following settings on this job: ● Set the printmode to the one that you plan to use, set also the correct substrate preset that you want to print on. ● In Method, select Step and Repeat. ● Check Fit Substrate width. ● Check Center. ● Increase the copies to reach a total length to print of at least 1 meters (40”).
4. Select print and through the Print Adjustment button, change the advance and dynamic color registration while printing, wait for 50 cm to be printed to be sure the printer has reached a stable phase (the first 50 cm can still be miss-aligned through the media advance or scan axis). 5. Use the following procedure to perform the fine tune: a. Advance: By checking the horizontal lines: ● If you see magenta above the black/cyan lines, increase the substrate-advance setting.
The calibration (color registration) will be visible after a certain length of substrate has been printed. The length will depend on the print mode. Examples: ● With a 2-pass print mode, about 1 m (40 in) of substrate will be printed before the calibration takes effect. ● With a 4-pass print mode, about 0.5 m (20 in) of substrate will beprinted before the calibration takes effect. ● With an 8-pass print mode, about 0.25 m (10 in) of substrate will be printed before the calibration takes effect.
