to commercial and advertising art, where his first commission had been to draw shoes for Glamour magazine in the late 1940s. In the 1950s, Warhol worked as a designer for shoe manufacturer Israel Miller. While working in the shoe industry, Warhol developed his "blotted line" technique, applying ink to paper and then blotting the ink while still wet, which was akin to a printmaking process on the most rudimentary scale. His use of tracing paper and ink allowed him to repeat the basic image and also to create endless variations on the theme. American photographer John Coplans recalled that In 1952, Warhol had his first solo show at the Hugo Gallery in New York, and although that show was not well received, by 1956, he was included in his first group exhibition at the Museum of Modern Art, New York. Warhol's "whimsical" ink drawings of shoe advertisements figured in some of his earliest showings at the Bodley Gallery in New York in 1957. Warhol habitually used the expedient of tracing photographs projected with an epidiascope. Using prints by Edward Wallowitch, his "first boyfriend," the photographs would undergo a subtle transformation during Warhol's often cursory tracing of contours and hatching of shadows. Warhol used Wallowitch's photograph Young Man Smoking a Cigarette (), for a 1958 design for a book cover he submitted to Simon and Schuster for the Walter Ross pulp novel The Immortal, and later used others for his series of paintings. With the rapid expansion of the record industry, RCA Records hired Warhol, along with another freelance artist, Sid Maurer, to design album covers and promotional materials. 1960s Warhol was an early adopter of the silk screen printmaking process as a technique for making paintings. In 1962, Warhol was taught silk screen printmaking techniques by Max Arthur Cohn at his graphic arts business in Manhattan. In his book Popism: The Warhol Sixties, Warhol writes: "When you do something exactly wrong, you always turn up something." In May 1962, Warhol was featured in an article in Time magazine with his painting Big Campbell's Soup Can with Can Opener (Vegetable) (1962), which initiated his most sustained motif, the Campbell's soup can. That painting became Warhol's first to be shown in a museum when it was exhibited at the Wadsworth Atheneum in Hartford in July 1962. On July 9, 1962, Warhol's exhibition opened at the Ferus Gallery in Los Angeles with Campbell's