By April Kingsley
 "Edward Clark's Luminous Expanses"
The American Rag, New York, 1980. p 138.

Clark invented a technique with a ... potential for speed in the early sixties when he began pushing acrylic pigment rapidly across the surface in one long swoop of a push broom. Splashes and splats of paint flew off on every side and were left there as mementos of the gesture's thrust. He had found that using a paint brush, even the wide one of the house painter, caused his hands to make short curving strokes whereas what he wanted was a single long swoop that could unify the canvas from side to side. The push broom's straight lines, and the straight path it cuts, made it the perfect tool for expressing the aggressive sexuality of his personal style.