Early children's books, such as Orbis Pictus, were illustrated by woodcut, and many times the same image was repeated in a number of books regardless of how appropriate the illustration was for the story. Newer processes, including copper and steel engraving were first used in the 1830s. One of the first uses of Chromolithography (a way of [mark=#FFFF00]making multi-colored [/mark]prints) in a children's book was demonstrated in Struwwelpeter, published in Germany in 1845. English illustrator Walter Crane refined its use in children's books in the late 1800s.