Frit ware

Islamic stone paste, also known as frit ware and quartz frit, is a characteristic type of pottery that seems to have been first made in Iraq during the ninth century C.E. Between the tenth and twelfth centuries it was made mainly in Egypt, and since then, and until the present time, Islamic paste has been made in most of the Middle East. 

From the almost entire absence of day in this fritted composition, the mixture must altogether be excluded from clay wares, being in fact neither more nor less than glass mixture, which, if submitted to complete fusion, would yield an alkaline glaBS. The heat, however, to which this mixture is axpoeed only admits of a. partial... 

The larger the proportions Of tin (n the ash the harder the enamel produced, and vice verad. The frit, ground and mixod with water, is applied to the wares in the usual way. 

The mixture was then cooled to ambient temperature and neutralized by adding 5.0 g of glacial acetic acid by syringe. After stirring for 15 minutes, the polymer was collected by vacuum filtration through a fritted metal Buchner funnel. The polymer was washed in a Waring blender four times with 500 ml of 4 1 (by volume) acetone/water and twice with 500... 

Heptathiazocine (1.4 g, 5.85 mmole) is dissolved in anhydrous diethyl ether (150 mL) in a 250-mL, three-necked flask. The solution is cooled to -78° (acetone-Dry Ice) under nitrogen and tetrabutylammonium hydroxide 7.5 mL of 25% solution in methanol, Eastman, 7.25 mmoles) in diethyl ether (12.5 mL) is added slowly. A yellow precipitate (sometimes with a greenish tinge) is formed immediately. The solution is kept at -78° and filtered through a coarse glass frit in a low-temperature filter funnel (Kontes, airless-ware). The greenish-yellow solid on the frit is transferred quickly to a dry box, and in the course of about 1 day it becomes a deep-purple solid. This solid contains elemental sulfur (x-ray... 

Lead raw glazes are often used for ceramic art ware, but seldom on an industrial scale owing to the danger of poisoning with lead compounds. If a lead glaze is to be used, it is more convenient to introduce PbO into the glaze in the form of a pre--melted frit. 

Belleek Ware. A distinctive type of pottery made at Belleek, County Fermanagh, Northern Ireland. The factory was established in 1857 and the ware is characterized by its thinness and slightly iridescent surface the body contains a significant proportion of frit. Bell Kiln. See top hat kiln. 

Sodium Antimouate. Na2O.Sb2O5.y2 H2O An opacifier for dry-process enamel frits for cast-iron enamel-ware and for some acid-resistant frits for sheet steel enamels. It is also a source of antimony for yellow ceramic colours. Sodium Carboxymethylcellulose. See carboxymethylcellulose. 

Soft-paste or Fritted Porcelain. A type of porcelain made from a soft body containing a glassy frit and fired at a comparatively low temperature (1100°C). The most famous soft-paste ware was that produced in the 18th century at the Sevres factory in France, and at Chelsea, Derby, Bow, Worcester and Longton Hall in England. The COMBINED nomenclature (q.v.) States that soft porcelain contains less alumina but more silica and fluxes than hard porcelain. See porcelain. 

CEVISAMA (Int l Exhibition of Ceramics, Building Surface Facings, Sanitary Ware, Fittings, Raw Materials, Glazes, Frits Machinery Valencia, Spain)... 

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