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Ceramics Terms and Techniques
Transcript of Ceramics Terms and Techniques
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
the quality of clay that allows it to be easily manipulated and still maintain its shape
contraction of the clay during drying or firing
handbuilding refers to clay not formed on a potter's wheel
kneading or mixing of clay in order to remove air bubbles and obtain a desired workable condition
a handbuilding technique where flat pieces of clay are rolled out and used to create a form
a handbuilding method where a form is created by rolling out rope-like shapes of clay and joining them
scratching clay in order to join two pieces together; increases surface area for better adhesion
clay mixed with water; used with scoring for joining two pieces of clay
any unfired clay ware
there are three stages to greenware
clay: wet, leather hard, and bone dry
plastic, malleable and moist clay
when most of the moisture has left the clay body but it is still soft enough to be carved, trimmed, etc.
when moisture has left the clay body; feels dry to the touch
the preliminary firing to harden the clay body; resulting clay piece is called bisqueware
uneven drying or firing when the form of a piece has changed its original shape
prevent by drying slowly and evenly during greenware stages
furnace used for firing ceramic products
a glass-like coating bonded to a ceramic surface by heat
cycle during which glaze materials are heated to melt and form a glassy surface coating when cooled