How to refill the HP 21 black ink cartridge

This post will show you how to properly refill a HP 21 black ink cartridge.

The Hp 21 ink cartridge is one of the most hp cartridge sold in America, it also among the oldest Hp cartridges. With excellent and durability performance you will receive the best quality print, for 5ML of ink you can print about 120 pages; after refilling the cartridges its production will be reduced by 20%. This is typically normal because by refilling the cartridge, you will not get the same ink quantity as buying a new one unless you pure more ink when refilling which is NOT recommended. 

We suggest, you always check the ink capacity of the cartridge you are trying to refill and make sure you do not surpass the limit on the label to avoid damaging the cartridges.

Instructions To Refill The black Hp 21 Ink Cartridge

Before starting this process, it recommended cleaning the print connectors for this type of cartridges especially if you have not used them for a long time to remove the dry ink in the cartridge head. To do so, you can read our post about how to run a printhead cleaning cycle for an ink cartridge.

It not mandatory to start the cleaning process before refilling the ink cartridges but it recommended especially if you have had refill the same cartridges numerous times.

Let's start the process:

Step 1.

Place the ink cartridge in a flat surface, put some cardboard or plastic on the floor in case of a spill. We do not recommend any white surface because it will be another hassle to clean the ink residue. 

Step 2.

Slowly remove the sticky label on the top of the cartridge, the one with the number and the color. Always remove the label before refilling the cartridge to allow the air enter inside the cartridge for a better and highest quality prints.

Cartridge orifice
Point of entry
Step 3

Take your syringe and slowly insert 5 ML of ink inside the cartridge. You need to do it very slowly for the ink to spread correctly and soak the whole cartridge sponge.

Step 4

After these steps completed, put the sticky label back on the top of the cartridge, put the cartridge inside the printer and print to test the cartridge. The print test completed, you leave the cartridge inside the printer.

If after following these steps and the printer does not still print, please leave a comment and we will reply as soon as possible.



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en.Rellenado: How to refill the HP 21 black ink cartridge
How to refill the HP 21 black ink cartridge
This post will show you how to properly refill a HP 21 black ink cartridge.
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