Materials play such a relevant and important role in the design process, with ink, watercolour, paint, acrylic and now even digital tools breathing life into ideas with substance and form. Controllable to a degree, these flowing, artistic ingredients frequently possess a mind and direction of their own, with behavioral traits and characteristics that are unique and interesting. New book Making a Splash: Graphics that Flow, presents a collection of significant and celebratory examples of these resources in action.