Big Head 1970 245x223x100cm	Around 1964, Niki started using the new material, polyester. This enabled her to produce sculptures of her own style, with curvy, soft lines. It also made it possible to work on colored sculptures and big outdoor sculptures. Niki uses more colors than any other sculptor, and her flexibility in choosing materials, and the liberal usage of colors make her works very special. Le Couple 1978 222x161x130cm