Relationship between avant-garde art and American pop culture brush strokes and in techniques partially dictated by chance, such as dripping or spilling the paint directly onto the canvas. Examples of this include Jackson Pollock dripping commercial paints on raw canvas to build up complex and tangled skeins of paint into exciting and suggestive linear patterns and Willem de Kooning used extremely vigorous and expressive brush strokes to build up richly colored and textured images. The second category of Abstract Expressionism is represented by a variety of styles ranging from Color field, to Lyrical abstraction; delicate imagery and fluid shapes and fields of color included in works by Clyfford
Tet (Morris Louis painting) and to artists in New York such as Barnett Newman, Mark Rothko, and Helen Frankenthaler. It was Frankenthaler who created the technique of staining: a process using thinned paint and gravity on an unstretched and untreated canvas. Greenberg admired Frankenthaler’s technique because of his theories on “purism” within the arts. Greenberg believed that painting’s one characteristic which distinguished it from other art forms was its “flatness.” This quality was enhanced by the staining process. The paint actually soaked into the surface of the canvas, showing no three-dimensional qualities. Frankenthaler’s painting "Mountains and Sea" would stand as Louis’s primary influence in