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CERAMICS
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What is Ceramics? Pottery or clay sculpture fired at high temperatures in a kiln to make them harder and stronger
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Ceramics Around the World
Ceramics have been used, throughout the world, for tens of thousands of years. Archeologists have uncovered human-made ceramics in the form of animal and human figurines that date back to at least 24,000 BC.
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Examples of African and Middle Eastern Ceramics
Iran Egypt 1800 BC Democratic Republic of Congo Saudi Arabia
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Examples of Asian Ceramics
China – Ming Dynasty 1300 AD Korea Terra Cotta Warriors 210 BC
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Examples of North and South American Ceramics
United States (Native American Pueblo) Peru (Incan) 400 AD
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Examples of European Ceramics
Netherlands (Delftware) Greece
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Examples of Contemporary Ceramics
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Examples of Contemporary Ceramics
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BASIC Materials Kiln: a specially designed oven capable of reaching temperatures over 2000° F (can be electric, gas, or wood-fired) Clay: moist, sticky dirt (mud) composed of fine-grained minerals, which can be shaped when wet and hardened when dried or heated Tools: mainly used to shape clay
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Common Types of Clay Earthenware: clay fired at relatively low temperatures (1800°F-2100°F), often contains iron and has a porous surface when fired Stoneware: a buff, gray or brown clay which is heavy, opaque, and highly plastic in nature with a high firing temperature (2200°F-2400°F) Porcelain: a very fine white clay with a high firing temperature (2200°F-2550°F), is non-porous, strong, and translucent when fired
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Tools, Tools, Tools…. hands modeling tools loop tools ribs sponge
wire clay cutter
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Clay Shaping Methods Wheel Throwing Slip Casting Hand Building
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Wheel Throwing
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Wheel Thrown Pottery
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Slip Casting Slip: a liquid mixture of clay and water
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Slip Cast Ceramics
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Hand Building Pinch Pot Coil Construction Slab Construction
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Pinch Pot Pinching is a pottery technique fundamental to manipulating clay. Making a pinch pot consists of pressing the thumb into a ball of clay, and drawing the clay out into a pot by repeatedly squeezing the clay between the thumb and fingers.
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Pinch Pots
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Coil Construction Coils are long, snake-like ropes of clay that are used in making pottery. It involves building the walls of a form with a series of coils into the required shape. The surface can either remain coil-textured or they can be smoothed.
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Coil Ceramics
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Slab Construction A pottery technique in which a form is built up by joining shapes cut from thick sheets of damp clay.
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Slab Construction SCORE AND SLIP
SCORING means you scratch into the clay with hatching or crosshatching marks SLIP is watery clay (made from dried clay). You paint it over your scoring to create an adhesive bond to connect one piece of clay to another. Sgraffito means to scratch. Sgraffito in pottery means that you paint one color of clay over another colored clay and then scratch out the design.
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Slab Ceramics
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Decorating Methods Stain: raw pigments, can be water or acrylic based
Burnishing: rearranging and compressing clay particles by rubbing the surface of a clay object until it becomes glossy Glaze: a glass coating that is especially made to stick onto ceramic surfaces Underglaze: colored slips applied beneath a glaze layer
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Stages of Clay Plastic clay: soft wet clay
Leather hard (greenware): clay is dry enough to maintain form and wet enough to be smoothed, carved, and added to Bone dry (greenware): clay has dried as much as possible before first firing and is extremely brittle Bisque: first firing where all remaining water molecules are released from the clay transforming it into ceramic (Why are air bubbles dangerous during a bisque fire?) Glazed: second firing where glaze has melted into the ceramic surface making it non-porous
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