When refilling ink cartridges the process is pretty straight forward, however, with each brand of ink cartridge that the person utilizes it is going to be slight different. But, even with the differences, the person is going to be looking for the hole in the ink cartridge that is going to allow them to place a small needle to inject the ink into the cartridge. Usually, this is located underneath the sticker that is on your cartridge naming the number and model of the ink cartridge. Once you remove the sticker, you are going to want to fill your needle with the ink. Usually the refill kit is going to have the tools that you are going to need in order to fill these, include the needle, the ink and the cleaning solution to wash the needle once you have finished.
Usually, the amount of ink you are going to need is around 25ml, however, some brands are going to use more or less. You will want to check the instructions that are included with the refill kit. You will want to drop this ink into the cartridge very slowly, so slow that it does not feel like you are making any progress at all. You want to do this slowly in order to make sure that the ink is going in without any air getting into it. Once you have it refilled, you will want to make sure that you run a cleaning cycle on the printer in order to make sure that it is working properly and is going to offer a good print job.