Wolke Inks & Printers - the leader of the thermal inkjet industry, was founded in 1991 by Mr Wolfgang Keller as Wolke Ink Jet Supplies. 2000 - Keller brought a groundbreaking, maintenance-free coding system on the market. The industry was fascinated by the m600 coding system, developed by Keller himself, and runs with the original Hewlett Packard Standard cartridge. 2007 - Wolke launched “The Next Generation“ of its m600 coding systems. With the starter model m600 basic and the coding specialist m600 advanced Wolke offers the optimum solution for any application.