How often can be refilled?

Every manufacturer wants to ensure that their ink cartridges work properly over the entire period. Preferably, however, they would then build the cartridges in such a way that they explode or vanish into thin air at the end of the usage period. This would be the only way to guarantee that users don't refill their cartridges with ink, but actually buy new ink cartridges that put plenty of money back into the manufacturers' coffers.

However, we have made the experience that printer cartridges can be refilled with ink more often than originally thought.

Small cartridges with sponges, e.g. HP color cartridges 500 and 600 can be refilled 4-5 times per color in practice. After that the sponge is so saturated that it can only hold very little ink and the cartridge starts to drip almost immediately after you start refilling the ink at the bottom, with large cartridges like Canon 600, HP 800 - 1200, Stylus 800 it happens more often, we have - because we wanted to know - kept an HP 1100 color cartridge alive for 14 months (with weekly refilling) but it just becomes less and less ink that the sponge can store and thus more and more time consuming.

Black high capacity cartridges can be refilled more often if no mistakes are made. However, the nozzles become larger over time, i.e. the cartridge carries more ink, which then leads to the ink flowing on poor paper or in color printing.

Refill ink comp. with Brother LC-223, LC-227, LC-229, LC-12E black pigmented
Refill ink comp. with Brother LC-223, LC-227, LC-229, LC-12E black pigmented
Refill Ink Selection, a selection of the best inks of the manufacturer OCP.
Content:   ( € /  )
Refill ink comp. with Brother LC-22UBK, BT6000BK, DCP-J 785, MFC-J 985 black
Refill ink comp. with Brother LC-22UBK, BT6000BK, DCP-J 785, MFC-J 985 black
The colour was developed by Octopus Fluids, specifically for Brother DCP-J 785, MFC-J 985.
Content:   ( € /  )
Ink for Canon PGI-525, 550, 555, 570, PG-540, 545, 510, 512 pigm. black
Ink for Canon PGI-525, 550, 555, 570, PG-540, 545, 510, 512 pigm. black
The colour was developed by OCP specifically for Canon Pixma PRO 100 photo printers.
Content:   ( € /  )
Octopus Refill Ink for HP 336, 337, 338, 339, 350, 350 XL pigmented black
Octopus Refill Ink for HP 336, 337, 338, 339, 350, 350 XL pigmented black
Test inks according to DIN 53126 are produced by Octopus Fluids® and tested according to DIN EN 14370, DIN 19268 and DIN 51562.
Content:   ( € /  )