"A condition usually associated with paper (and paper pulp) and leather. Paper is said to be air dry when its moisture content (usually 3 to 9%) is in equilibrium with the atmospheric conditions to which it is exposed. Leather is considered to be air dry when its moisture content is approximately 14% of the weight of the leather. Their different moisture contents in the air dry state makes it difficult to regulate the conditions of storage of a leather bound book." 
Translations for "air dry"
- Danish: (translation needed)}
- Dutch: (translation needed)
- French: (translation needed)
- German: (translation needed)
- Italian: asciugatura all'aria
- Latin: (translation needed)
- Spanish: (translation needed)
- Swedish: (translation needed)
- Roberts, Matt T. and Don Etherington. "Air dry". Bookbinding and the Conservation of Books, A Dictionary of Descriptive Terminology. Conservation Online, 1994. Web. 27 October 2014.