Washington Color School

The term colour field painting is applied to the work of abstract painters working in the 1950s and 1960s characterised by large areas of a more or less flat single colour

Post-painterly abstraction is a blanket term covering a range of new developments in abstract painting in the late 1950s and early 1960s, characterised by a more rigorous approach to abstraction

Acrylic paint is water-based fast-drying paint widely used by artists since the 1960s. It can be used thickly or thinly depending how much water is added to it

Abstract expressionism is the term applied to new forms of abstract art developed by American painters such as Jackson Pollock, Mark Rothko and Willem de Kooning in the 1940s and 1950s. It is often characterised by gestural brush-strokes or mark-making, and the impression of spontaneity

Hard edge painting is an approach to abstract painting that became widespread in the 1960s and is characterized by areas of flat colour with sharp, clear (or ‘hard’) edges

The term New York school seems to have come into use in the 1940s to describe the radical art scene that emerged in New York after the Second World War