Channa Horwitz

Channa Horwitz spent four decades building a rigorous, self-devised visual language out of the most ordinary materials: orange graph paper, ink, colored pencil, and the numbers one through eight. Born Channa Helene Shapiro in Los Angeles, where she lived and worked her entire life, she attended art school for a single year in the 1950s before marrying and raising children, returning to study at California State University, Northridge in the early 1960s. In 1964 she made the decision that would organize the rest of her practice - restricting herself to the orange grid of commercial graph paper, a deliberate narrowing of choice in an era that prized gestural freedom.

In 1968 she submitted a proposal for a kinetic light sculpture to LACMA's Art and Technology program. It was never realized; no work by a woman was executed for the exhibition, an omission that provoked sustained protest from the Los Angeles feminist art community. The diagram Horwitz devised to plot the sculpture's movement, however, became the seed of Sonakinatography - sound, motion, notation - a system charting eight entities across time through numbers and assigned colors on eight-to-the-inch paper. She earned her BFA from CalArts in 1972, studying with John Baldessari and Allan Kaprow, and her scores were subsequently performed by composers, choreographers, and musicians.

Horwitz worked in near-total isolation from the art world for most of her life. Serious recognition arrived only in her final years, with documenta 13 in 2012 and a posthumous inclusion in the 2014 Whitney Biennial.