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The history of ceramic repair is vast and ranges from different methods and methodologies. For example, in 16th century China, people would repair broken ceramics by using pieces from other objects to disguise the patch. A sixteenth-century manuscript describes the process of patching broken ceramics:
Crazing is a spider web pattern of cracks penetrating the glaze. It is caused by tensile stresses greater than the glaze is able to withstand. [1] [2] Common reasons for such stresses are: a mismatch between the thermal expansions of glaze and body; from moisture expansion of the body; and in the case of glazed tiles fixed to a wall, movement of the wall or of the bonding material used to fix ...
Staple repair is another technique used to repair broken ceramic pieces, [26] where small holes are drilled on either side of a crack and metal staples are bent to hold the pieces together. [27] Staple repair was used in Europe (in ancient Greece, England and Russia among others), South America, [ 28 ] and China as a repair technique for ...
Typical French craquelure in a portrait from c. 1750, larger and less regular patterns, with curving cracks. Painting systems are composed of complex layers with unique mechanical properties that depend on the type of drying oil or paint medium used and the presence of paint additives, such as organic solvents, surfactants, and plasticizers.
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A common example is a fig leaf being painted over a nude figure. Overly aggressive cleaning with acid can also cause damage. Acid cleaning is meant to remove insoluble salts and minerals from the surface of archaeological ceramics. Pottery that has been improperly cleaned and damaged by acid may have pitted, cracked, powdery, or flaking ...