Dating pottery finds

Wedging can also help produce an even moisture content.Once a clay body has been kneaded and de-aired or wedged, it is shaped by a variety of techniques.Glaze is a glassy coating on pottery, the primary purposes of which are decoration and protection.One important use of glaze is to render porous pottery vessels impermeable to water and other liquids.After it has been shaped, it is dried and then fired.There are several materials that are referred to as clay.During the process of throwing, the wheel rotates while the solid ball of soft clay is pressed, squeezed and pulled gently upwards and outwards into a hollow shape.

There can be regional variations in the properties of raw materials used for the production of pottery, and this can lead to wares that are unique in character to a locality.A clay body can be decorated before or after firing.Prior to some shaping processes, clay must be prepared.Air trapped within the clay body needs to be removed.This is called de-airing and can be accomplished either by a machine called a vacuum pug or manually by wedging.

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