There may be some debate as to whether it is actually OK to refill printer ink cartridges or otherwise not, however, these days more and more people are trying ink cartridge refill kits instead of paying lots of money for new cartridges every time a well used one runs out.
Provided that you choose high quality inks, it will always be fine to refill cartridges. The concept of employing an ink cartridge refill has an undeservedly bad reputation because in the past these refills were considered to be bad quality, and they would print blurry, smudged pages. Today, which has changed. You can purchase great inks that can refill with no damage to the head in the cartridge, and revel in amazing performance whenever.