Whiteware pottery

Within the northern Valley of Guatemala whiteware tradition, there is a basic dichotomy between Sacojito-Chinautla whiteware and Durazno whiteware. Durazno potters exploit sources of whiteware clay different from the source used by Sacojito-Chinautla potters (55). Durazno whiteware pottery and raw materials therefore should be distinguishable from Chinau-tla-Sacojito whiteware. 

Whiteware pottery - heavy metals mineral oils... 

Slaked lime is sometimes blended with the kaolin and ball clays used in the production of whiteware pottery. It helps to bind the materials and also increases the whiteness of the fired product [32.4]. 

Traditional ceramics include high-volume items such bricks and tiles, toilet bowls (whitewares), and pottery. 

Figure 9.5 shows an example of a large industrial continuous furnace. The classic use is for firing bricks, pottery, tiles, and whitewares. Similar furnaces are used in the production of advanced ceramics such as multilayer ceramic chip capacitors. 

China. BS 5416 specifies this to be pottery with water absorption 0.2% and tranlucency 0.75% (assessed by comparison with standard test pieces) See also bone china. In the USA, however, ASTM-C242 defines the word as any glazed or unglazed vitreous ceramic whiteware used for nontechnical purposes, e.g. dinnerware, sanitary-ware, and art-ware, provided that they are vitreous. The combined nomenclature (q.v.) equates this term with porcelain (q.v.). 

Ovenware. Ceramic whiteware or glassware (casseroles etc) of good thermal shock resistance for use in cooking. Overalls. Workers overalls in the pottery industry are designed without lapels, pockets and other dust traps. 

Pate Dure, Pfite Tendre. hard fired and SOFT fired (i.e. too high or low temperature) whitewares respectively. Pate-sur-PSte. A method of pottery decoration in which a bas-relief is built up by hand-painting with clay slip as the paint. The method is more particularly suited to the decoration of vases in the classical style fine examples were made by M. L. Solon at Mintons Ltd.,... 

In USA the term whiteware (q.v.) is used. A pottery is also general usage for the factory where pottery is made. Potting Material. A material for the protection of electrical components, e.g. transformers. The use for this purpose of sintered alumina powder, within hermetically sealed cans, has proved successful. 

White s Test. A method for the detection of free lime, for example in Portland cement or dolomite refractories. A few mg of the powdered sample is placed on a glass microscope-slide and wetted with a solution of 5g phenol dissolved in 5 ml nitrobenzene with the addition of two drops of water. Micro-examination (x 80) will reveal the formation of long birefringent needles if free CaO is present. (A. H. White, Industr. Engng. Chem. 1, 5, 1909.) Whiteware. A general term for all those varieties of pottery that usually have a white body, e.g. tableware, sanitary ware and wall tiles. See also ceramic WHITEWARE, which has an ASTM definition. 

The amounts of feldspar used in common types of pottery bodies are sanitaryware, 25-35% hotel china, 15-35% chemical porcelain, 15-30% electrical porcelain, 30-50% whiteware, 15-30% floor and wall tile, 10-55%. 

Clay Products Clay is the principal component of whitewares (e.g., pottery and tableware) and structural clay products (e.g., building bricks and tiles). Ingredients (in addition to clay) may be added, such as feldspar and quartz these influence changes that occur during firing. 

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