The Milwaukee Art Museum exhibition “Tattoo: Flash Art of Amund Dietzel” celebrates a medium that thrives in today’s culture. One of the 20th century’s master tattoo artists, Dietzel worked in Milwaukee until his death in 1974, imprinting the human form with meticulous drawings. While often working double time painting signs to pay the family bills, Dietzel defined tattoo art through his ability as a colorist and draftsman. This particular exhibition recognizes Dietzel’s contributions through newspaper clippings and photographs; the gallery resembles a tattoo parlor with the gallery walls hung with his personal flash art—the watercolor and ink drawings a customer would admire and choose to have permanently placed on his or her body. The exhibit runs through Oct. 13.