Any drawing done on paper is in danger of deterioration.

One cause of deterioration is acid in the paper, which makes it brittle and weak. The best way to protect against this is to check paper for acidity before applying any medium. After the work is finished it should be mounted, matted and framed using acid-free materials, since acid travels from one surface to another.

Another cause of deterioration is light. Light can make paper dry and brittle as well as fade the colors of a piece. Artwork done on paper should not be displayed in direct light, though soft glows are safe to use.

Humidity and temperature are also dangers to drawings. High humidity can lead to the growth of mold or mildew in paper. Temperatures that are too high can cause paper to become brittle, while temperatures that are too low can cause paper to crumble. Drawings done on paper should be displayed in a controlled environment.

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