HP Cartridge Air in Chambers?

[repro]

I am using a vacuum to the nozzles and have attached an ink line to the HP cartridge but the vacuum constantly pulls through ink and air, I submerged the whole cartridge and vacuum sucker in ink but still air came through the nozzles. As it would seem impossible that if the whole cartridge is submerged in ink that air could not keep coming out of the nozzles should I take it that air is always present in ink and by pulling the ink through the nozzles using a vacuum with sucker to do this, that as the ink goes through the nozzles this creates air?

If so how can I illiminate air coming through the nozzles?

By the way this is on a HP No 80 printhead, so large format not small format.

 

[websnail]

Do you have any pictures or illustrations of what you're trying to do?

I'm finding it hard to understand the setup you have and how you're trying to get things working at the moment.

 

[Token]

OP: well, im not too familiar with the either cartridge or your setup, but i think it could be two things:
1- There is a lot of air in the cartridge, and it is this air that is comming out even though the cartridge is submerged.
The fix would be to keep using the machine/vacuum device until the air stops escaping.
2- the vacuum is very strong, and it is causing the dissolved gasses in the ink to come out of solution. This is more likely/possible than you may believe. If you have a syringe, put a small quantity of water in it (eg, 1 ml), and then pull back on the syringe to create a partial vacuum. You will see bubbles form as the dissolved gases outgas (ecape from the liquid). To fix this, reduce the vacuum intensity and keep drawing ink in to the cartridge. This may take longer to fill, but it may stop the "air" from escaping

websnail: i think (im not too sure either) he is trying to vacuum refill his carts by submerging the cartridge in ink and drawing out the old contents of the cart with a vacuum. I assume he either removes the vacuum device to let the ink in, or the cart has two holes, and while pulling the vacuum from one hole, the ink enters the cart from the other hole. Im imagining a similar situation using a canon cli-8 cart with a refill hole in the reserve tank, and then attaching a vacuum device to the output port, causing ink to rush in from the refil hole and/or the air vent at the top. OP, please correct me if i am wrong.

 

[repro]

These cartridges have an ink in valve and when vacuuming the nozzles it suckes the air out and pulls the ink in from the ink in valve. I submerged in ink as a test to see if air was entering the cartridge from the ink in port connection I had. I think 'Token' is spot on that the vacuum is forcing gases out of the ink and it does not seem to make any difference even if I vacuum for 20 minutes or turn the speed of the vacuum down I still get bubbles.

Back to the drawing board I think!

 

[vlad]

I placed a speaker onto a ink cartridge.The magnet de-magnetised the solution.Works on cannon.HP.

 

[Token]

I placed a speaker onto a ink cartridge.The magnet de-magnetised the solution.Works on cannon.HP.

You demagnetised the solution? :/ How is that possible? I'm quite sure that ink doesn't contain any ferromagnetic components...
Would you mind explaining what exactly you did, and what effects it had? You've made me (and the rest of the forum i'm sure) quite curious...

 

[mikling]

You have some trapped microbubbles within the cartridge. These can be hiding in crevices and under a layer of old thick ink. Your pulling on the head with a vacuum, basically expands these small microbbles which are now loosened by new ink diluting dried up thick ink. This allows the bubbles to finally break free.

One way to see this is if you have the equipment ( which you are not likely to have) is to place ink into the old sponge directly then put it in a vacuum chamber. You will get some foaming. Now take a clean sponge free of old ink and put in new ink and place in vacuum again. No foaming. The trapped microbubbles is also a partial explanation why after multiple refills, the cartridge keeps accepting less and less ink as well as not releasing it. It also explains why pro refillers will flush out the sponge during a proper remanufacture. It also explains why the head refill adapters are really for amateur use who want to get something done as simply as possible but not necessarily the correct way. It has its use but also has limitations.

Just popping in new ink for the most part works but there is a limit.

 

[vlad]

They re-chemicalize the ink in factories,so that,their brands only work with thier printers.The magnet really nutralizes the minute particles and makes it more user freindly on all printers.Kepp the magnet on for ar least a week.You can google "Magnetised Water" which is benificial for health.Same principle.If you have any more questions.please ask.My success rate is 99%.as in the past it was zero.