Which Abstract Expressionist is known for her 'soak-stain' painting technique?

Helen Frankenthaler is the Abstract Expressionist known for the “soak-stain” painting technique.

Frankenthaler developed the method in the early 1950s by pouring or brushing heavily diluted paint onto unprimed canvas. Instead of sitting on top of a ground layer, the pigment soaked into the fibers, producing translucent pools and flowing shapes that could resemble watercolor.

Her breakthrough 1952 painting Mountains and Sea is closely associated with this approach. Frankenthaler often placed her canvas on the floor, an idea connected to Jackson Pollock’s working methods, but her soft-edged fields and luminous color led in a more lyrical direction. The technique helped bridge Abstract Expressionism and Color Field painting.

The method is sometimes confused with ordinary staining or with the work of later Color Field painters. Artists including Morris Louis and Kenneth Noland adapted Frankenthaler’s innovations. She later moved away from soak-stain painting, and from 1963 increasingly used acrylics, which offered greater opacity and sharper edges.