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Fill materials are used to fill in missing parts or breaks in a ceramic piece in order to stabilize the piece. A wide range of materials and techniques have been used to restore losses in ceramics. Today the most common filling materials are made from calcium-sulphate-based fillers or synthetic resins such as epoxy, acrylic, or polyester resin.
These variations affect the color of the clay before and after firing. Iron is the most common material found in clay, and can add red, grey, or buff coloring to the object. [ 5 ] Pottery can be coarse wares, which are undecorated or only minimally decorated utilitarian vessels, or fine wares, which are decorated, finely potted, and used for a ...
Frit. A frit is a ceramic composition that has been fused, quenched, and granulated.Frits form an important part of the batches used in compounding enamels and ceramic glazes; the purpose of this pre-fusion is to render any soluble and/or toxic components insoluble by causing them to combine with silica and other added oxides. [1]
Ceramic glaze, or simply glaze, is a glassy coating on ceramics. It is used for decoration, to ensure the item is impermeable to liquids and to minimise the adherence of pollutants. It is used for decoration, to ensure the item is impermeable to liquids and to minimise the adherence of pollutants.
The colours applied on top of the glaze blended into it during firing (the technique thereby differing from underglaze painting used with transparent glazes). [24] The disadvantage was that only a narrow group of pigments produced good colours after firing at the relatively high temperatures of up to 1000 °C.
The broader term ceramic painting includes painted decoration on lead-glazed earthenware such as creamware or tin-glazed pottery such as maiolica or faience. Typically the body is first fired in a kiln to convert it into a hard porous biscuit or bisque .
In ceramics, craquelure in ceramic glazes, where it is often a desired effect, is called "crackle"; it is a characteristic of Chinese Ge ware in particular. This is usually differentiated from crazing , which is a glaze defect in firing, or the result of aging or damage.
Overglaze decoration, overglaze enamelling, or on-glaze decoration, is a method of decorating pottery, most often porcelain, where the coloured decoration is applied on top of the already fired and glazed surface, and then fixed in a second firing at a relatively low temperature, often in a muffle kiln. It is often described as producing ...
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