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In 1959 Edward Ruscha used flat, conventional typefaces for his first word pieces, meticulously rendering found words and phrases, which caused them to assume unexpected poetic, associative, or narrative connotations. By the mid-1960s he developed a new series called "wet words." In drawings such as Pool, the word seems to have been formed by the sudden splashing of liquid on the paper. Ruscha achieved this apparently accidental effect using a painstaking technique: he faintly sketched the image and incised the outlines on paper, then brushed on delicate layers of gunpowder wash and gunpowder, scraping out and erasing to create the areas of highlight.