Exam Reviews-Ceramics
Posted by: clong in Ceramics Classes, This Week/Lessons/Assignments, UncategorizedCeramics:
- Slip – liquid, pudding consistency of clay that acts as glue.
- Ceramics – pottery or hollowware clay sculpture
- Burrs- little pieces of clay that will form from a drawn or carved (sgrafitto) line into clay that is too wet to be carved.
- Kiln – the oven or furnace that can reach very high temperatures and is used to fire the clay.
- Fuse – to melt together.
- Impressed Design – stamped into the leather-hard clay with a tool or die.
- Incised Design – pattern cut into the clay with a sharp tool.
- Ware – general term for a formed ceramic project.
- Clay body – made up of a mixture of clays.
- Low Fire – firing a kiln above 1300 F (704 C), but more typically from 1641 F (894 C) and up to 1940 F (1060 C), or cone 010 to cone 04.
- Shrinkage – the decrease in the size of clay pottery due to drying and firing. Dry shrinkage is reversible with the return of water, but firing shrinkage is permanent due to chemical and physical changes the clay undergoes when exposed to heat.
- Fire – to cook the clay at the appropriate temperature
- Bisqueware – clay that has been fired once and not glazed. It is still porous – not waterproof.
- G-1 – the clear glaze that is applied to under glaze in multiple coats of three Under Glaze – a decorative technique in which one or more colorants are applied to pottery.
- Overglaze – Overglaze can be clear or colored but always has silica, alumina and flux present to create a fusion of the glaze to the surface of the bisqueware.
- Wall – the sides of a clay pot.
- Dry foot- technique of sanding the bottom of any project to remove under and over glaze.
- Foot – the bottom of a pot.
- Banding wheel – a decorating wheel that is used to apply glazes, ensure circular conformity in the forming of the pot.
- Coiling – a hand building technique used to make pottery. Long round strips of clay are used. They can vary from a thin strip to a large sausage like strip. It is hand manipulated, pinched and squashed together to form a pot without the coil like look from how it was started, though in some cases the clay can be left snakelike for the decorative look. It is started at the base of the pot and built upwards.
- Colorant – any substance that will color something else.
- Earthernware – a low fire clay that fires at cone 05 (approximately 1989 F in the kiln.
- Cheese hard – this stage of clay can be carefully handled without deformation, due to it being dried sufficiently from its plastic state. It is the softest stage at which pottery can be shaved. Further drying would make it the leather hard stage.
- Leather hard – clay that has lost moisture to evaporation but has not completely hardened. It is bendable and is a good stage to graffito.
- Bone dry – clay that is warm to the touch and is ready to fire. All moisture is gone from the project. Cheek test – if it is cool to the touch it is not dry enough.
- Greenware – unfired formed clay project waiting to dry.
- Kidney – a kidney shaped tool that can be used for smoothing and pressing clay in a mold. For smoothing purposes it is made of rubber or wood.
- Sgraffito – this is a design that can be made by scraping or scratching through a layer of slip that has been applied to a piece of pottery to reach the contrasting color of the clay body beneath. OR simply scratching/drawing into the surface of leatherhard clay.
- Score – to rough up each surface area of two pieces of clay that are to be joined.
Ceramics vocabulary
- Earthenware Clay – also called a “low fire” clay that fires off at approximately 1989 deg. F. Clay is made up of three things: eroded rock surface, moisture and gases.
- Metal Rib/Kidney – this tool is expressly used for scraping dry clay particles off tables to make for a clean and dust free working environment.
- Fettling knife – blunt knife with a flexible blade used to cut or carve the clay.
- Plastic – clay that is wet and workable.
- Wedging – kneading moist clay to eliminate air bubbles and produce a uniform texture. Wedging is imperative so projects do not explode in the kiln.
- Fire – ceramic term for cooking the clay to its correct temperature.
- Slake – the process of reconstituting recycled runny clay into a plastic clay body by allowing it to sit on the plaster bat and soaking up the moisture by evaporation.
- Bat – a thick plaster slab on which wet clay is left to lose sufficient moisture to make it plastic.
- Petroglyph – a prehistoric work of art that is carved into a rock surface.
- tile – A slab of hard material such as baked clay. It is flat, textured or in bas-relief. It may either be single or considered as a group.
- Bas relief- A French term meaning “low-raised work”. (pr. bah’ruh-leef’)





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