Pulp covers were printed in color on higher-quality (slick) paper. They were famous for their half-dressed damsels in distress, usually awaiting a rescuing hero. Cover art played a major part in the marketing of pulp magazines. The early pulp magazines could boast covers by some distinguished American artists; The Popular Magazine had covers by N.C. Wyeth, and Edgar Franklin Wittmack contributed cover art to Argosy and Short Stories. Later, many artists specialized in creating covers mainly for the pulps; a number of the most successful cover artists became as popular as the authors featured on the interior pages. Among the most famous pulp artists were Walter Baumhofer, Earle K. Bergey, Margaret Brundage, Edd Cartier, Virgil Finlay, Frank R. Paul, Norman Saunders,
Nick Eggenhofer, (who specialized in Western illustrations), Hugh J. Ward,
George Rozen, and Rudolph Belarski. Covers were important enough to sales that sometimes they would be designed first; authors would then be shown the cover art and asked to write a story to match.
Later pulps began to feature interior illustrations, depicting elements of the stories. The drawings were printed in black ink on the same cream-colored paper used for the text, and had to use specific techniques to avoid blotting on the coarse texture of the cheap pulp. Thus, fine lines and heavy detail were usually not an option. Shading was by crosshatching or pointillism, and even that had to be limited and coarse. Usually the art was black lines on the paper's background, but Finlay and a few others did some work that was primarily white lines against large dark areas.