Legalities can be an important fact concerning inkjet ink cartridges. Legally every printer manufacturing companies is somehow involved in printer ink manufacturing and re-manufacturing too. Some companies are also involved in the single use concept. This means that if anyone refills printer ink cartridges for reuse then they can face legal action. You need to check all legal terms and conditions before choosing to become a home cartridge refiller. Buying a cartridge should not be a problem for the consumer public.