In the mid- to late 1950s Mac began experimenting with different media (inks, gouache, casein, oils, colored tissue collage, encaustic, and combinations of several of these) and different pictorial styles.  Her colors became opaque with strong contrasts between lights and darks; her brushwork became vigorous and agitated, at times violent.  She incorporated splatters and drips, and built up thickly textured layers of color on color (this was the heyday of New York School Action Painting, after all).  Many of these works are on stiff board or Masonite, since most of these media would crack on canvas and are too heavy for paper.
Her experimental works are all abstractions:  jazzy urban scenes, harsh wintery woodland sweeps of grays and blues, roiling seas and fragmented harbors.  Some of them approach J.M.H Turner, others recall Mark Tobey, Paul Klee, Ben Shahn, and many others.
She exhibited these paintings at the Silvermine Guild of Artists, New Canaan; the Wilton Library; the Walker Gallery and Rive Gauche Gallery, both Darien; and the Bridgeport Art League into the mid-1960s. While these works include some of her most ambitious, most of her fans would not be aware of them, because her later work was so different.

View mixed media paintings.

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