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HP Designjet 500, 510, and 800 Series Printers - Print Quality issues Using Clear Film or Matte Film

Issue:
Banding, streaks, black areas are not solid when using HP Clear Film or HP Matte Film on an HP Designjet 500, 500PS, 510, 800 or 800PS printer.
Cause
HP Clear Film and HP Matte film are regarded as Technical media, and should not be expected to host area fills; they are "lines only" media. The main problem is related to the coalescence/dot gain problem. As ink is laid down on Clear Film it tends to combine resulting in reduced dot size. The result on a printed area fill is the perception of "holes" between the dots, which translate into banding of a frequency greater than the advance itself. More than that, the grid of small dots spaced at 600 dpi or 1200 dpi can produce a lot of bands (like the advance frequency itself) that would remain hidden if the dots covered the grid area totally.
There is no way of improving the image quality because this media was regarded as technical media, and CAD modes are too fast for laying down a lot of ink which in any case the media could not take. One option would be try to "reuse" an IQ printmode suited for a different media by loading Clear as Coated or low cost glossy, but again this probably will result in ink issue were the media will not take the ink.
Recommendations
  1. Check the printer. It could be that printer is having general advance problems, not only related to Clear Film but to other media as well. Check banding performance across all media.
  2. Check for possible pen health problems.
  3. Check what sorts of plots are producing banding or print quality problems. If they are mostly area fills, we advise printing them on more appropriate media (Clear Film is NOT a Large Format equivalent of transparency media for office Deskjets).
WORKAROUND: The following workaround is provided for those who need to print black solid areas with clear film:
  1. Reuse the Coated printmode for Clear film.
  2. Load HP Clear film from the Front Panel
  3. Select Coated paper in the Media menu.
In HP-GL/2 driverproperties:
  1. Basic Setup
    • Quality: BEST
    • Optimize: for Images ( More…: select Maximum Detail
  2. CAD
    • Lines and fills color: Use only black
  3. Color
    • Color use: True black

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