Ink cartridges are something that must be purchased frequently and can be quite expensive. There can be big savings in buying refills rather than new cartridges.
There are a few things you need to be aware of, though, if you're going to use refill kits.
Printers are quite specific as to the type of ink that must be used for the printer to function property. Refills that say they can be used for all types of printers may not be trustworthy.
You need to be sure to get a refill that is specifically compatible with your brand and model of printer, to get the best results.
Also you want to factor in what you are getting for your money. You want to be aware of how many refills you are actually getting in a kit.
While this can keep the price down, remember that a cartridge should only be refilled a couple of times before it is replaced. After that, it will start to malfunction and it won't matter how good the refill ink is, your print quality will still be poor.
Most refill kits come with enough ink for filling a cartridge more than one time. So when you have to replace your cartridge you can hold on to your remaining refill ink and when your new cartridge runs out you will be ready to refill it. You may also be able to save by buying refurbished cartridges.
Ink also does not last forever. When purchasing your refill kit you need to keep in mind how quickly you will be able to use it. If you will not be able to use all the ink before it goes bad you may want to rethink the purchase.
The refill process is not an easy one unless you have special tools. There are places that specialize in refilling cartridges and have the needed tools to make the process easy. If you are going to do it yourself remember it can be messy so you can't rush or be careless.
When you're doing it yourself, ink can leak or spill and it can make a real mess if you're not careful. Be sure to read through the refill kit instructions thoroughly before attempting the refill - probably a couple of times.
Check the website of the company you bought the kit from and see if they have any special tips or even a video showing how the process works.
Give yourself plenty of time on your first attempt to refill a cartridge. It is a learning process and you don't want to be in a hurry. If you have to get something out right away you don't want to be worrying about refilling your cartridge. Set aside some time to learn to do it correctly.