Bob and Roberta Smith is recognised for his trademark, text-based paintings. These colourful signs are hand painted onto scraps of wood and roughly nailed together. The shapes and misshapes of letters are as important as the message they spell out. These fields of colour ask questions, make statements and instigate debate. Letters swim before your eyes as you attempt to decipher a text, which could be an announcement of an event or provocative call for action. Bob and Roberta Smith’s work explores the relationship between humour, politics and society and questions established values and...