HP Designjet Z3100 Photo Printer series - Manual (Page 144)

Edges of objects are darker than expected
If edges of objects seem darker than expected, and you have already set the print-quality slider to
Quality in the driver dialog (Mac OS Print dialog), select the custom print-quality options, and make
sure that the More Passes and Maximum Detail options are turned off. See
Printing on page 41 .
Bronzing
If you are printing on photo paper in grayscale, and you experience a gloss differential problem when
fluorescent light is directly reflected towards you from the print, producing 'bronzed' reflections from the
ink, try one of the following:
● If using standard print quality options, ensure that the slider is set to Quality (see Select print
quality on page 42 )
● If using custom print quality options, ensure that the Gloss enhancer option is set to Whole
page (see
High-quality printing on page 48 )
● Display the print vertically or behind glass
Horizontal lines at the end of a cut sheet print
This type of defect affects only the end of a print, within approximately 30 mm of the trailing edge of the
paper. You may see some very thin horizontal lines across the print.
To avoid this problem:
1. Print the Image Diagnostics Print. See The Image Diagnostics Print on page 137 .
2. Consider printing with roll paper.
3. Consider using larger margins around your image.
Vertical lines of different colors
If your print has vertical bands of different colors along it:
1. Try using thicker paper, choosing from the recommended paper types such as HP Heavyweight
Coated Paper and HP Super Heavyweight Paper. See
Order paper on page 107 .
2. Try using higher print-quality settings (see Printing on page 41 ). For instance, if you have set the
Print Quality slider to Speed, try setting it to Quality; if you have already set it to Quality, try
selecting custom options and then More Passes.
134 Chapter 12 Troubleshooting print-quality issues ENWW
Troubleshooting print-
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