Study for 'Praise'

Bridget Riley, C.H. (b. 1931) Study for 'Praise' signed, inscribed and dated 'Study for 'Praise'./Bridget Riley '81' (lower left), inscribed again 'Turquoise, Red, Yellow, Blue, Black and White./lilac, fresh green and orange sensations/affection all colours including Blacks and Whites./positive colour interaction.' (lower right) pencil and gouache 32¾ x 24½ in. (83.2 x 62.2 cm.)