Conservation
Sculptures are sensitive to environmental conditions such as temperature, humidity and exposure to light and ultraviolet light. Acid rain can also cause damage to certain building materials and historical monuments. This results when sulfuric acid in the rain chemically reacts with the calcium compounds in the stones (limestone, sandstone, marble and granite) to create gypsum, which then flakes off.
At any time many contemporary sculptures have usually been on display in public places; theft was not a problem as pieces were instantly recognisable. In the early twentyfirst century the value of metal rose to such an extent that theft of massive bronze sculpture for the value of the metal became a problem; sculpture worth millions being stolen and melted down for the relatively low value of the metal, a tiny fraction of the value of the artwork.
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Famous quotes containing the word conservation:
“A country grows in history not only because of the heroism of its troops on the field of battle, it grows also when it turns to justice and to right for the conservation of its interests.”
—Aristide Briand (1862–1932)
“The putting into force of laws which shall secure the conservation of our resources, as far as they may be within the jurisdiction of the Federal Government, including the more important work of saving and restoring our forests and the great improvement of waterways, are all proper government functions which must involve large expenditure if properly performed.”
—William Howard Taft (1857–1930)