Primer Grey, Centers for Gravity. As Corday transitions from sculpture to paint and back again, she actively and physically engages in transforming elemental materials and surfaces through experimental alchemical processes. In 2010, Corday’s black iron oxide color was selected by the architect Michael Arad and the committee overseeing the National September 11 Memorial at One World Trade Center. The artist spent nine months applying her blackening color with a plasma torch over the 15,000 square feet of the Memorial. She realized that in making paint, she was suspending elements in material states rather than manipulating pigments. Primer Grey, Centers for Gravity is a series of sculptural paintings in which the artist has concentrated grey pigment itself as a medium. The primer is both a medium with a function, and a color. The same grey color is used across all the works, preventing privilege or hierarchy, a principal theme in Corday’s practice.