Problem: random white areas, light bands in a vertical orientation, generally only visible on dark solid color prints
UPDATE 9/12/2016 - We have launched a new versions of several of our most popular products, called High Performance, which may eliminate some of the problems described below, as well as provide several other advantages. Details on these new products can be found HERE.
Our test results indicate that vertical banding sometimes observed on LX300 series printers is not intrinsic to the material itself. The vertical banding occurs as a result of the printer’s media transport system and platen design which, combined with high curing heat, can cause a soft, compliant material like Dreamscape wallcovering to form ridges running in the transport direction. This process effectively changes the distance from the jet nozzles to the media ultimately resulting in slight changes in dot registration. Under some visual circumstances, especially in large areas of continuous color, this slight mis-registration is revealed as vertical banding. We have found that increasing passes while decreasing vacuum and temperature has been helpful to control this problem in some situations.
Note: Several procedures are available to determine if banding is due to a printer or media defect. The most definitive method is to rotate the material 90 degrees and print the same art. Printer banding will not rotate with the media. This test, unfortunately, is not easily accomplished with HP latex printers. We suggest, in order to validate the integrity of the media, that you test the same art on a printer using different transport and ink set.