Frankenthaler invented a way of painting by letting colour soak into an unprepared canvas on her studio floor. The results, all around you in this brilliant selection, are entrancing and authoritative. The colours are definitely inside the surface, not on it. They are fused into the unprimed fabric: pooled, puddled, and left to dry.
Frankenthaler’s work is discussed several times in the book Abstract Painting: Concepts and Techniques .