HP Designjet 4520 Printer series - Manual (Page 162)

3. Reprint your image with the same settings as before.
4. If the problem persists, replace the printhead that seems to be causing the problem. If you are not
sure which printhead is responsible, use the Image Diagnostics Print to identify it. See
How do I...
(Image Diagnostics Print topics) on page 117 .
Graininess
1. Check that you are using appropriate print quality settings. See Choose print quality settings
on page 57 .
2. Use the Image Diagnostics Print to find out more about the problem. See How do I... (Image
Diagnostics Print topics) on page 117 .
The paper is not flat
If the paper does not lie flat when it comes out of the printer, but has shallow waves in it, you are likely
to see visible defects in the printed image, such as vertical stripes. This can happen when you use thin
paper that becomes saturated with ink.
Try changing to a heavier paper type: we recommend HP Heavyweight Coated Paper or HP Productivity
Photo Gloss for printing dense colors. See also
Choose print quality settings on page 57 .
The print smudges when touched
The black ink pigment can smudge when touched by a finger or pen. This is particularly noticeable on
the following materials: vellum, translucent bond, films, productivity photo paper and natural tracing
paper.
152 Chapter 15 The problem is... (print quality topics) ENWW
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