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Cleaning aims to restore artworks to how the artist intended them to look; however, how an artwork is cleaned will depend on the nature of the material to be removed. With paintings, a variety of organic solvents are used, but the most common solvent is water, often with chelating agents, surfactants or salts to control pH.
Acid erodes the stone, leaving dull marks on polished surfaces. In time it may cause deep pitting, eventually totally obliterating the forms of statues, memorials and other sculptures. Even mild household acids, including cola, wine, vinegar, lemon juice and milk, can damage vulnerable types of stone.
The cleaning, handling, storage, and in general treatment of ceramics is consistent with that of glass because they are made of similar oxygen-rich components, such as silicates. [2] In conservation ceramics are broken down into three groups: unfired clay , earthenware or terracotta , and stoneware and porcelain .
The four female statues were removed from the fountain in November 2022 so they could be conserved and replicated. ... The limestone is the same material Petersen used for other well-known ...
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Many limestone statues and building surfaces have suffered severe damage due to acid rain. [111] [112] Likewise limestone gravel has been used to protect lakes vulnerable to acid rain, acting as a pH buffering agent. [113] Acid-based cleaning chemicals can also etch limestone, which should only be cleaned with a neutral or mild alkali-based ...
When addressing minor repairs and minimal cleaning of objects containing bone, antler, or horn, there are some methods/products that are avoided. [17] Liquid-based cleaners or detergents used to clean surface dirt and dust can damage the objects. Over-the-counter adhesives used to repair cracks and breaks can stain and become brittle over time.