Last year, the Musée d’Orsay mounted an exhibition on polychrome sculptures from the 19th century. There was something revelatory about these painted busts and figures since, of course, we are conditioned to seeing the purest marble or bronze. That show passed through the mind while taking in Iris van Herpen’s collection today with its enigmatic explorations of color and form. The most recent collection included two or three solid hues amid her signature stony, metallic palette. But these gaseous movements of ocher and purple, these waves of vermillion, and these kinetic patterns in...…Last year, the Musée d’Orsay mounted an exhibition on polychrome sculptures from the 19th century. There was something revelatory about these painted busts and figures since, of course, we are conditioned to seeing the purest marble or bronze. That show passed through the mind while taking in Iris van Herpen’s collection today with its enigmatic explorations of color and form. The most recent collection included two or three solid hues amid her signature stony, metallic palette. But these gaseous movements of ocher and purple, these waves of vermillion, and these kinetic patterns in...WW…