Printer Ink is important if you want something to be documented in black and white. But while many are trying to develop alternative savings as far as ink consumption is concerned, there are some printers that make of ink made from other materials.
Like for instance this printer, the Riti printer designed by Jeon Hwan Ju. It takes your coffee or tea dregs, plus a little elbow grease, and turns them into an eco-friendly alternative to conventional ink.
To use the RITI you place the coffee or tea dregs into the ink cartridge with some water, insert a piece of paper (100% recycled we hope) and move the cartridge backwards and forwards in the slot while drawing on the paper. Using your own kinetic energy to power the process also means no electricity is needed, and you have all that coffee induced energy to burn anyway. Once complete you empty the cartridge, meaning your coffee leftovers can continue their journey to the compost bin