Bulk ink systems are printing setups that use large containers of ink instead of traditional cartridges. These systems allow users to refill their ink supply directly from the bulk containers, which can be more cost-effective and environmentally friendly. They are commonly used in home offices and businesses that require high-volume printing. These systems typically consist of a reservoir for the ink, tubes that connect to the printer, and a mechanism to ensure a steady flow of ink. Many inkjet printers are compatible with bulk ink systems, making them a popular choice for those looking to reduce printing costs and waste.