Origins and types of Clay Flashcards
What is the earths crust made out of?
Feldspar
What are the 6 characteristics of secondary clay?
color varies, has impurities, small in size, plasticity varies, firing temp varies, and opaque
How does residual clay become a secondary clay?
natural forces weathering and transporting the clay, it has picked up impurities that changed the clay to secondary
What are the 3 clay’s used by potters?
Earthenware, stoneware, and porcelain
What are some characteristics of Earthenware?
Low firing temp, fragile, porous, varies in color and plasticity
What are some characteristics of Stoneware?
medium firing temp, not fragile, non-porous, vitrified when fired to maturity, varies in color and plasticity
What are some characteristics of Porcelain?
High firing temp, white, hard not fragile, translucent, non-plastic, no impurities
Whats does Transparent mean?
see through
Whats does Translucent mean?
can not see through, light pass through
Whats does opaque mean?
light can not pass through
Whats does plasticity mean?
malleable
Whats does igneous mean?
produced by the action of fire
Whats does porous mean?
full of holes (water can go through)
Whats does residual mean?
leftover
Whats does vitrify mean?
become glass-like