Study for Painting. Four Colours, Black+White Visual Grey, Warm and Cold Yellow Sensation

Bridget Riley (b. 1931) Study for Painting. Four Colours, Black+White Visual Grey, Warm and Cold Yellow Sensation signed and dated 'Bridget Riley'81' (lower right), titled 'Study for painting. Four colours, Black + White Visual Grey, warm and cold yellow sensation.' (lower left) gouache and graphite on paper 27 3/8 x 23 3/8in. (69.5 x 59.3cm.) Executed in 1981