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Grog, temper for clay. Grog, also known as firesand and chamotte, is a raw material usually made from crushed and ground potsherds, reintroduced into crude clay to temper it before making ceramic ware. It has a high percentage of silica and alumina. It is normally available as a powder or chippings, and is an important ingredient in Coade stone.
-- "The term pottery includes many varieties of ware from the crudest vessels of prehistoric times to the most beautiful decorated porcelains, stoneware and earthenware; it also includes many articles such as large grain-jars used in ancient times for storing corn and other dry materials, wine-jars and modern sanitaryware and the large tanks ...
Some clays used to make pottery do not require the addition of tempers. Pure kaolin clay does not require tempering. [6] Some clays are self-tempered, that is, naturally contain enough mica, sand, or sponge spicules that they do not require additional tempering.
Most Groggs are 9 inches tall or less and are made of a type of clay called grog. Groggs are usually made of popular Welsh rugby players, [1] Welsh celebrities [2] and the occasional non-Welsh celebrity. [3] [4] Whenever possible the person who is "grogged" is presented with the first Grogg produced. [5]
Cord-marked pottery was made in several shapes. An inverted cone shape, with a pointed bottom and up to 2 1/2 feet tall, was used for storing food. The walls of the pottery were very thick, and were too heavy to haul food a great distance. This would have been a great improvement over storing food directly underground without a container.
Shapes of pottery. Subcategories. This category has the following 4 subcategories, out of 4 total. A. Ancient Greek pot shapes (1 C, 53 P) C. Crockery (8 P) S.
The word "ceramic" is derived from the Greek word κεραμικός (keramikos) meaning pottery.It is related to the older Indo-European language root "to burn". [2] " Ceramic" may be used as a noun in the singular to refer to a ceramic material or the product of ceramic manufacture, or as an adjective.
Some pottery vases were probably intended as cheaper substitutes for these, either for use or to be placed as grave goods. Some terms, especially among the types of kylix or drinking cup, combine a shape and a type or location of decoration, as in the band cup , eye cup and others.