Pasmore exhibited his first constructed reliefs in 1952. However, those with vertical slants, such as this work, were begun in 1954 and continued in many different versions until 1961. Although the series owes something to the ideas of the American constructionist Charles Biederman, the grouping of the planes into a rectangular block and the restricted palette make them very different from Biederman’s bold, more dispersed, reliefs. Pasmore’s are distinctly architectural, and, in 1956, enlarged versions were placed in the Stephenson Engineering Building at the University of Newcastle-Upon-Tyne with the intention to stimulate the space.