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Make sure that none of your inks are reporting as expired. Replacing just PHs will work for a short time as there is a reservoir in the PH, but if the inks in the system are pigment depleted, they need to be replaced with fresh ink - including the ink in the ink delivery system.
Yes, all parts and labor delivered on-site. It is available from HP Service. Call 800-204-8344 and tell the remote service agent that you want the flat-rate 3-5 day response.
Almost certainly plasticizer-contaminated media. To prove this (or disprove it), clean a defined area with isopropyl alcohol and a cloth, and mark the edge of the cleaned area with a sharpie marker. Retract the media into the printer and print a job that extends from outside of the marked area...
1. Verify that nozzle performance is good - run a Nozzle Test print to verify this.
2. Perform a printhead alignment - there are two types of alignment, automatic and manual. Accurate printhead alignments are critical for grain reduction. Various SAV films will exhibit different amounts of...
+1 to the previous comment re vacuum and IPD
If there are wavy roller marks in the print, that indicates that the media is contaminated with high concentrations of plasticizers. Static cling medias generally are manufactured with large amounts of plasticizers in the mix, and often times this...
Coatings can degrade over time. Some media products have a date of manufacture on the box.
I would not expect an art canvas to contain plasticizers. Most digital print art canvas medias are made from cotton/ polyester blends. In this industry, plasticizers are put into PVC-based print medias to...
The answer is that the pigment loading has been increased in these inks. By removing the anti-scratch agent from the colored inks and putting it into it's own supply called overcoat, this permits increasing the volume of pigments contained in the color inks.
The color gamut is definitely larger than with previous generations of Latex, and even more significantly, proximity to maximal color gamut is realized using high productivity print modes as low as 4 or 6 pass.
The difference is night and day at these pass counts - (it might even blow your mind:)).
There is no retraction of the media when printing single or multiple ink layers (2 or 3), the media always advances in 1 direction only.
Three layer printing is slow, but with the completely automated maintenance of these devices, they can easily be run unattended overnight or as needed, to...
Consumable items from HP Latex printers are available for recycling at no cost to the customer, through the Planet Partners program- even including packaging and shipping costs..
https://www8.hp.com/us/en/hp-information/recycling/ink-toner.html
In addition, the new Latex 700 and 800 Series...
There is no requirement to remove the white heads from the carriage and store them in the offline rotation chamber, but the advantage of so doing is that is zero white ink waste while the PHs are offline.
If white ink is being run on a daily basis there is no benefit from offline storage in...
Aside from the ink cost difference, there are throughput advantages for the 800 Series. Depending on the print mode, the 800 delivers between 15 - 21 percent greater speed than the 700 at the same pass count. More unattunedness, lower running costs + greater throughput for the 800 Series.
If your question has to do with producing more vibrant printed colors (including denser blacks) on transparent media for window graphics or day-night application, the answer is to use white ink as an underflood or overflood - which of these would depend on whether the print will be viewed...
Like most ink chemistries used in outdoor durable graphics, HP Latex inks are fairly translucent in the absence of a fairly opaque backing, which is typically white. You can put higher ink density on transparent media in order to gain a bit more opacity - something between 150 and 200 percent...
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