What is Ceramics? Technically, ceramics are those things made from materials which are permanently changed when heated Ceramics: art of making object with.

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Presentation transcript:

What is Ceramics? Technically, ceramics are those things made from materials which are permanently changed when heated Ceramics: art of making object with clay to produce pottery and sculpture

What is Pottery? Pottery is generally considered to be containers made from clay. "Pot" is a term used for any number of container forms. Potter’s wheel: a revolving wheel, powered by foot or by electricity, on which clay is shaped into pottery

In the world of Ceramics, there can be: Pottery & Sculpture

Pottery

Sculpture

Handbuilt & Wheel thrown

Types of Handbuilt Pinch Coil Slab

Slab Roller Slab roller: a mechanical device for rolling out slabs to a set, consistent thickness

Score & Slip Score: scratching or otherwise roughening the edges of damp or leatherhard clay before joining pieces Slip: creamy mixture of clay and water used to fasten pieces of clay together

Coil Pots Levels of Skill Coil: long roll joined in to a circle or spiral

Extruder Mechanical aid for forming moist clay by pressing it through a die

Creating a Ceramic Pot Form & Balance

Creating a Ceramic Pot Thickness of the walls

Creating a Ceramic Pot Rim & Bottom

Creating a Ceramic Pot Embellishments: Handle, Feet, etc.

Embellishments can Help or Hurt

Burnishing Burnishing: compacting the surface of a pot or coating of slip, usually by rubbing with a smooth hard object (stone or spoon) so that the surface appears shiny and polished

Stages of Clay Wet Clay Stiff, sticky earth that is used in ceramics It is wet and hardens after drying or heating Wedge: kneading a mass of clay to expel air and get rid of lumps Ware: pottery pieces in the raw, bisque, or glazed state

Stages of Clay Leatherhard Condition of a clay body when much of the moisture has evaporated and shrinkage has just ended but the clay is not totally dry. Carving, burnishing, or joining slabs is often done at this stage. Shrinkage: loss of volume in clay as it dries or is fired

Stages of Clay Greenware/ Bone dry Unfired pottery or sculpture Very brittle! If you forget to wrap your unfinished project in a plastic bag and it gets this dry… it’s game over! Drying: elimination of water from pots and sculpture. Insufficient drying before firing can result in a piece exploding in the kiln, while drying too fast can cause warping or cracking of the ware.

Stages of Clay Bisque Unglazed ceramic ware that has been fired at a low temperature to remove all moisture from the clay body Bisque firing: process of firing ware at a low temperature

Stages of Clay Glaze Thin glossy coating fired onto pottery Glaze firing: firing during which glaze materials melt and form a vitreous coating on the clay body surface Vitreous: having the nature of glass. Dense, hard, nonabsorbent condition

Glaze Mixing

Kiln Kiln: a furnace or an oven built of heating resistant materials for firing pottery or sculpture Firing: heating pottery or sculpture in a kiln or open fire to ring the clay or glaze to maturity

Pyrometric cones Small triangular cones made of ceramic materials that are compounded to bend and melt at specific temperatures, thus enabling the potter to determine when the firing is complete Peephole: hole in the door or wall of kiln through which the ceramist can watch the pyrometric cones

Stilts Triangular supports with either clay or heat-resistant metal points used to support pieces of glazed pottery above the shelves during firing. Keeps the glaze form sticking the ware to the shelf