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Ink questions

HP 8720

Question applies to every hp inkjet I've owned. Since I work in retail, it applies to many of my customers as well.




I place new cartridges (HP brand) in my printer.


I may print 1-5 pages and power the printer off. It'll stay powered off anywhere from a day to a month.


Next time I power it on, my cartridges are down by 20-30 percent.

Same process, print 1-5 pages and power the printer. 


Next time, another 15-30 percent.


My color cartridges end up lasting 20-30 pages, even though I only print 3-5 that actually use color. The rest I select the "Black Only" option when printing.

Black cartridges end up lasting 50-75 pages.


Any ideas on what is going on?

Why don't HP printer print until the ink is gone, instead of guessing at how much ink might be in the cartridges?

Why doesn't HP offer a CISS style accessory for their printers?

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HP Support Agent
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Ink questions



Welcome to the HP Support Community!


I reviewed your post and I understand that you want to know why the ink is depleted when the printer is not in use.


Don’t worry, I assure you I will try my best to get this sorted.


I would like to inform you that the ink evaporates mostly through the hole required to let air in when ink is taken out. This is why they are sold sealed.


Some of HP’s inkjet systems are sensitive to air ingestion and water evaporation, which can cause ink to change over time, adversely impacting the printhead and the ink delivery components within the printer. To protect the printing system and ensure print quality, certain HP printers are designed to stop ink cartridges from working when they reach a built-in date, calculated from when each ink cartridge is installed. Some of these systems allow users to override the stoppage and continue printing at their own risk.


In case if you are not using the printer for a longer duration I recommend you store the cartridges in an airtight container or a plastic bad.


Please refer to the below article for more information.


I hope that answers your question and you have a great day!


If you wish to show appreciation for my efforts, mark my post as Accept as Solution. Your feedback counts!




I am an HP Employee

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