The following years brought fourth important experiments, among them the occupation with color grading and interferences between 1966 and 1968. Dadamaino intensively examined the effects of spectral colors to which she added black, white and brown in order to interrelate them. In 1967, at the peak of this development, she made our "ricerca del colore", an "exploration of the color". In ten squared plates the artist analyzes the reciprocal effect of color and form, by grading each color in light and dark shades and contrasting it in lamellar stripes, she creates motion in the observer's eye. A work of special aesthetic presence from Dadamaino's most important period of creation was born.