My prints are exhibiting vertical banding, how can this be fixed?

Posted in Sign & Display media for HP Latex printers by HP User Fri May 15 2015 16:42:11 GMT+0000 (Coordinated Universal Time)·3·Viewed 7,993 times

May 18, 2015

Different kinds of vertical bands may appear, for different reasons:

Regular vertical bands matching the shape of the platen may be seen on paper-based substrates and in general on thin substrates in medium-density area fills such as grays or violets. Try the following suggestions to mitigate this problem:

  • Align the printheads.
  • Try the automatic correction for vertical banding. At the front panel, press the gear icon, then Image quality maintenance > Vertical correction. This option should also be available in your RIP.
  • Reduce the vacuum level in steps of 5 mmH2O when printing on vinyl. Do not exceed the lower limit of 10 mmH2O for vinyls or 25 mmH2O for papers to avoid crashes and/or smears. Consider using the substrate edge holders to avoid lateral crashes.
  • Consider using the take-up reel, for better control of the substrate.
  • This kind of banding is less visible when the printer is stable at high temperature (after more than half an hour of continuous printing). You can help to avoid visible banding by modifying the printing queue so that vulnerable or important prints are printed later; or by pre-warming the printer by using the option available in your RIP.

Thin vertical dark bands, typically seen in the first 6-8 inches of the print in high-density area fills or in backlit applications.

  • Reduce the ink quantity if possible.
  • Disable the cutter (Latex 360 and 370 only).
  • When using backlit and synthetic substrates, decrease the vacuum level to values around 5–15, depending on the substrate thickness. More vacuum is normally applied to thick substrates and less to thin substrates.
  • Increase the number of passes.
  • If applicable, use the RIP to group jobs together, so that printer temperatures remain more stable between jobs.

Irregular or isolated vertical bands with abnormal levels of graininess

  • Increase the vacuum level in steps of 5 mmH2O. Do not exceed the following limits: 20 mmH2O for banners, 45 mmH2O for vinyl, and 50 mmH2O for other substrate families.
  • In backlit applications, increase the number of passes to 20, maintaining the vacuum level below 20 mmH2O.
  • If the banding appears only at the beginning of the print, disable the cutter (360 only) and advance the substrate manually about 100–150 mm before the first print.

marked this as solved
Sep 20, 2016

Tried all these things and its still showing up badly, done all firmware updates, print in other colors its fine but in the required black and grey it shows really bad horizontal banding

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