Vintage Abstract Composition - San Francisco School in Oil on Canvas A bold San Francisco School abstract expressionist painting by artist Kristin Cohen (American, b. 1963). Bright reds, oranges, and yellows surround a teal rectangular shape with rounded corners. Various other bold shapes inhabit the space, creating visual interest. From a collection of the artist's work. Unsigned and unframed. Canvas size: 22"H x 28"W. A California abstract expressionist artist, Kristin studied at Humboldt State University and with Micheal Dee Cookinham, a bay area figurative and abstract expressionist painter.