Caro uses found industrial objects that engage the spectator on a one-to-one basis. Using various bright colours, the sculptures confront the spectator into conversation, displaying a radical departure from previous sculpture works of the generation. There is no recorded reason for the colours used in specific instances, however each colour of the works is unique. Caro often worked in steel, but also in a diverse range of other materials, including bronze, silver, lead, stoneware, wood and paper. The exploration of each material is portrayed in the larger sculptural works within the manipulation of curves and folds that might otherwise seem impossible.