MATERIALS AND TECHNOLOGIES Caterina Giovannini
THE CLEANING PROCESS [ This article was taken from QA_A05N04 ]
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The cleaning is a delicate process, which is achieved balancing the needed effectiveness with the potential damage. This means identifying an operating method to safeguard the specificity of each intervention. The cleaning consists in the removal of unwanted material from the surface of an architectural object. This is done for its preservation or in order to improve its appearance. Being irreversible, this is a particularly difficult phase. An improper operation might cause an irreparable damage to the artifact, compromising the integrity of important materials for the determination of its historical significance and even causing an acceleration of the degradation already in progress. The deposits which are usually cleaned are mainly: the products of the alteration of building materials, atmospheric particulate matter, vandalistic writings and graffiti, dust, salt efflorescence, partially or totally soluble encrustations, layers of intentionally applied materials which are no longer appropriate nor functional, infestations of plants, dropping of animals, etc.
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