Since the introduction of ‘water-based inks’ in screen printing doubts about the true nature of their basis prompted research into the possibility of producing inks from vegetable sources. History suggests that not only is this possible but that it might even be viable as an industrial process. The research reported on here concentrates primarily on the development of a range of ‘process’ or ‘trichromatic’ colours. Complementing this work, the establishment of an ‘Ink Garden’ capable of supplying quantities of plant material for further research, is also described. Initial results show considerable cause for optimism though some problems remain.