WASHINGTON, DC.- Robert Ryman: Variations and Improvisations, the artist’s first solo show in DC, presents twenty-five paintings that demonstrate the diversity of Ryman’s pictorial experimentation. The small works (almost all are between seven- and ten-inch squares) span the last fifty-three years of the eighty-year-old painter’s career. The paintings represent a striking variety of surfaces and materials including oil on canvas, pastel graphite and charcoal on paper, vinyl polymer paint on aluminum, double-baked porcelain enamel on oxidized copper panels, and ink on glassine, to name some. The represented techniques vary as much as the materials. Ryman has caked some