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Ceramics Terms and Techniques

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Jessica Miroglotta

on 23 January 2012

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Transcript of Ceramics Terms and Techniques

Ceramics Terms
& Techniques

Ceramics
ceramics or pottery refers to objects made out of clay

clay is a natural material created from the eroding of feldspars, a type of rock

clay is defined by its plasticity and shrinkage
plasticity
the quality of clay that allows it to be easily manipulated and still maintain its shape
shrinkage
contraction of the clay during drying or firing
Techniques
for Handbuilding
handbuilding refers to clay not formed on a potter's wheel
wedging
kneading or mixing of clay in order to remove air bubbles and obtain a desired workable condition
slab building
a handbuilding technique where flat pieces of clay are rolled out and used to create a form
coil building
a handbuilding method where a form is created by rolling out rope-like shapes of clay and joining them
scoring
scratching clay in order to join two pieces together; increases surface area for better adhesion
slip
clay mixed with water; used with scoring for joining two pieces of clay
greenware
any unfired clay ware

there are three stages to greenware
clay: wet, leather hard, and bone dry
wet clay
plastic, malleable and moist clay
leather hard
when most of the moisture has left the clay body but it is still soft enough to be carved, trimmed, etc.
bone dry
when moisture has left the clay body; feels dry to the touch
bisque firing
the preliminary firing to harden the clay body; resulting clay piece is called bisqueware
warping
uneven drying or firing when the form of a piece has changed its original shape

prevent by drying slowly and evenly during greenware stages
kiln
furnace used for firing ceramic products
glaze
a glass-like coating bonded to a ceramic surface by heat
glaze fire
cycle during which glaze materials are heated to melt and form a glassy surface coating when cooled
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