Making a drawing by referring to an image visible underneath it. Tracing paper is made translucent for this purpose. While artists sometimes use tracing simply as a means of copying another image, and often their own image, they use it best to improve upon images.
A printing technique that involves carving text in relief upon a wooden block. When inked, the impression is transferred to paper. The oldest known printed works were produced by this method in Japan and China during the 8th and 9th centuries. This method of wood-block printing appeared in Europe in the 14th century and eventually inspired Johannes Gutenberg to create type pieces out of metal.