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  2. Conservation and restoration of parchment - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    Japanese paper: Paper is dissimilar to parchment in both appearance and behavior, which can pose the future issue of storing an object with composite materials. Paper infills can be toned with watercolor or acrylic paints to better match the original parchment appearance. Acrylic-toned papers are treated with various adhesives such as B-72 ...

  3. Conservation and restoration of frescos - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    At the same time, the wax filled in cracks in the surfaces, sealing moisture inside the walls, further weakening them by compromising the strength of the mortar holding the walls together. By 2013 the villa, like most of Pompeii, was in dire need of modern conservation, as was a protective covering that had been constructed in different phases ...

  4. Glaze defects - Wikipedia

    en.wikipedia.org/wiki/Glaze_defects

    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 ...

  5. Epoxy - Wikipedia

    en.wikipedia.org/wiki/Epoxy

    Epoxy is the family of basic components or cured end products of epoxy resins. Epoxy resins, also known as polyepoxides, are a class of reactive prepolymers and polymers which contain epoxide groups. The epoxide functional group is also collectively called epoxy. [1] The IUPAC name for an epoxide group is an oxirane.

  6. Craquelure - Wikipedia

    en.wikipedia.org/wiki/Craquelure

    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.

  7. Trencadís - Wikipedia

    en.wikipedia.org/wiki/Trencadís

    Trencadís (Catalan pronunciation: [tɾəŋkəˈðis]), also known as pique assiette, broken tile mosaics, bits and pieces, memoryware, and shardware, is a type of mosaic made from cemented-together tile shards and broken chinaware. [1] [2] It is commonly associated with Antoni Gaudi, see below. Glazed china and ceramics tend to be preferred ...