"Leather and skin objects are particularly susceptible to mould growth. Leathers and skins retain materials that were deposited during use, or those that were applied in an attempt to keep leather flexible and attractive. The leather and applied materials are food sources for mould. Although mould spores are always present in the air, they are able to grow only if environmental conditions are suitable. ... The information presented here is useful when a few mouldy leather objects are discovered"--p. 3-4.