Ink tank printers are also Inkjet models. Instead of ink cartridges, refillable ink tanks are designed in which ink can be filled. It does not rely on toner cartridges for printing and works with different nozzles or tanks for filling inks in liquid form. Unlike cartridges, where you need to replace all the colors even if you run out of just 1 color, here, you can refill just that 1 color into the printer tank.
Moreover, these printers come with the advantage of extremely low cost per page & thus, are ideal for users who have regular to high printing needs.