Though he began his career as a painter, Craig Kauffman began to make factory-produced plastic reliefs towards the end of 1963. The earliest of these incorporated relatively complex shapes protruding from a flat surface. By 1967, the shape of the reliefs had become regular and symmetrical. This work is one of a series of vacuum-formed pieces: one in solid red plastic, one in solid blue and three multi-coloured. Kauffman has said that they were produced using the same method as custom car bodies and parts.