The issue I'm experiencing is the following:
We're running long runs of paper stock (Hp Premium Papers and other variations) 150ft+.
The paper seems to bubble right before entering the heating/curing bar, which causes the print head carriage to leave streaks or cause fuzzy print quality.
I'm in the process of experimenting with different heat settings and vacuum settings (currently running on 200 degrees and 90 vacuum.) We've also experimented with interpass delay and several HP paper profiles and custom created profiles.
Are there recommended techniques for printing long runs of paper to prevent this?
#1 Your vacuum settings could be too high. Also check the amount of ink saturation - that can cause cockling in media when too high. Definitely do a full procedure to check best print mode, saturation, level of optimiser (paper doesn't need a lot), temperature and vacuum.
Regardless of a preset media being used it is always best to adjust and do tests to determine the best settings to suit your environment and quality expectations.
Video on paper presets from Tim - this details a lot and should be quite helpful:
Paper presets found here:
and the media locator
I hope that helps.
Paper media can be a relatively temperamental class of substrates with Gen 3 HP Latex printers, primarily due to the environmental changes that the paper is subjected to within the printer and curing unit. There are papers that do not react well to rapid changes in environment that the printer subjects the media to when printing.
There are paper-based media products which behave far better than others do. The place to start is with Certified paper products, as well as HP branded papers. These medias and their media presets are available on the Media Locator site, with poster papers, photo base papers, and even gift wrapping paper that are widely available. This is true with any of the 100, 300, and 500 Series HP Latex printers
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