Glossary
fugitive colors
Short-lived pigments and dyes-- capable of fading or changing, especially with exposure to light, to atmospheric pollution, or when mixed with certain substances; in each case the result of a chemical change. Examples are the colors in magazine photographs and inexpensive construction papers, especially the yellows, and then reds. While student works are generally forgiven the use of such inexpensive poor-quality pigments, professional artists' works are expected to be made with permanent colors. Tubes and other containers of paint are sometimes labeled with a code indicating a color's degree of permanence.
xylography
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.
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