Test review Flashcards
What are the 3 reasons for firing?
Permanency, utility, beauty
What is the range of temperatures on the ceramic temperatures chart?
Cone 012 - cone 13, or 1623 degrees to 2462
What temperature has to be reached to eliminate moisture from clay?
350 - 450 degrees
What temperature must be reached to eliminate the chemically combined water from clay?
950-1300
At what temperature is quartz conversion reached?
1850 (cone 06-05)
When alumina and silica begin to crystallize and harden.
Quartz conversion
Inversion takes place in several chemical stages with resultant expansion and shrinkage during the _________ and ___________.
Firing and cooling process
The ____________ in clay and glazes sets temperature at which omelette crystallization occurs.
Silica/flux ratio
During a bisque firing, green ware is fired to:
Cone 06, 1831 degrees
During glaze firings, glazed bisque is fired in a reduction atmosphere to:
Cone 10, 2381 degrees
Cone 8(2305) - cone 13 (2462)
Stoneware,porcelain
Cone 5 92185) - cone 13 (2462)
Salt
Cone 2 (2142) - cone 7 (2264)
Medium fire
Cone 022 (1112) - cone 1 (2109)
Earthenware
Cone 017 (1382) -cone 06 (1830)
Raku
Cutting or carving a line into clay:
Incising
Scratching slip decoration to reveal the clay underneath
Sgraffito
Attaching mold produced designs to leather hard clay by scoring and slipping
Sprigging
Applying slip with a syringe to crate lines, which can then be combed or feathered.
Slip trailing
Applying colored clip to leatherhard clay using a brush
Slip decoration
Pressing a textured surface or design into clay
Stamping
A preliminary firing to prepare clay forms for glazing without fear of breakage
Bisque
A clay form that has been bisque fired
Biscuit
Clays can shrink from.
12-25 percent, called shrinkage
To soak a material in water
Slake
