This evening, a sold-out audience will look on as master printer Scip Barnhart demonstrates basic printmaking techniques on view in the exhibition Jasper Johns: Variations on a Theme. Barnhart, who teaches printmaking, art of the book, and drawing at Georgetown University and is director of Union Printmakers Atelier, created a limited edition print for the occasion. He printed one for each participant and hung them up to dry in his studio last week, then sent us this photo.