There's a use for coffee you might not know about - it can be used to develop film instead of the traditional blend of chemicals. Dunedin interdisciplinary artist Christopher Schmelz uses coffee derivitave caffenol to develop negatives of photographs - ideally in a public space like a cafe so staff and customers can have their pictures taken then see negatives being processed, hung up to dry, and the finished portrait. He's bringing his Caffenol cafe to the capital as part of an residency at the Pyramid Club.