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The term is based on the word "whet", which means to sharpen a blade, [3] [4] not on the word "wet". The verb nowadays to describe the process of using a sharpening stone for a knife is simply to sharpen, but the older term to whet is still sometimes used, though so rare in this sense that it is no longer mentioned in, for example, the Oxford Living Dictionaries.
Ceramic drawings in Terroso. Castro ceramics were a part of the Castro Culture of the northwestern Iberian Peninsula. The ceramics were made mostly by hand, [1] although in some cases a pottery wheel was used. In many cases, signs of smoothing and flattening are visible on the pots.
Flagstone (flag) is a generic flat stone, sometimes cut in regular rectangular or square shape and usually used for paving slabs or walkways, patios, flooring, fences and roofing. It may be used for memorials, headstones, facades and other construction.
The permanent swelling of a ceramic article during firing caused by the evolution of gases. Blunging The energetic mixing of ceramic raw materials, especially clays, with water to produce slip or slurry. Undertaken in large tanks called blungers. [2] Body The structural portion of a ceramic article, or the material or mixture from which it is made.
Novaculite, also called Arkansas Stone, is a microcrystalline to cryptocrystalline rock type that consists of silica in the form of chert or flint. It is commonly white to grey or black in color, with a specific gravity that ranges from 2.2 to 2.5.
Conservation and restoration of ceramic objects is a process dedicated to the preservation and protection of objects of historical and personal value made from ceramic. Typically, this activity of conservation-restoration is undertaken by a conservator-restorer , especially when dealing with an object of cultural heritage .
The soft stone is easily carved and is not degraded by heating. The slick surface of soapstone allows the finished object to be easily removed. Welders and fabricators use soapstone as a marker due to its resistance to heat; it remains visible when heat is applied. It has also been used for many years by seamstresses, carpenters, and other ...
The formulation quoted in the original patent (Brit. Pat. 3724, 1813) by Charles James Mason, is four parts china clay, four parts china stone, four parts calcined flint, three parts prepared ironstone and a trace of cobalt oxide. However, it has long been known that no ironstone was used; its mention, and the name of the product, was used to ...
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