Getting Started

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PINCHED BURNISHED BIRD
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Working with simplified form.
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Studio Procedures
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LockersAvailable on a first come first served
basis.Sign up with a partner. Check locker first.
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Clay is available for purchase.
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Recycle 3.50 Earthenware 6.50 Stoneware
6.50 Porcelain - 7.50
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We use one cone 6 terracotta and everything else
is cone 10.NO LOWFIRE CLAY
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Getting Started With Clay
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What is clay? How is it different than just dirt?
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Al2O3 2SiO2 2H2O
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Clay Origins
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Clay is decomposed granite.The closer to the
source, the purer the clay. Kaolin, the main
ingredient of porcelain is the purest known clay.
Earthenware has the lowest melting point, it has
journeyed the furthest.
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Clay Properties

• Plasticity the property of being able to be
  molded and retain shape,slippery
• Shrinkage cracks as it shrinks
• Refractory resists melting, resists acid
• Transforms heat chemicals changes into
  permanent shape

• Plasticity Ball clays most plastic
• Shrinkage Grog, sand or temper is added to
  reduce shrinkage cracking
• Refractory many earthenwares will melt
• Transformation clay becomes permanent around
  1000deg during bisque (porous)

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Categories of Clay Bodies

• Earthenware low fire, porous, grey-red
• terracotta (cone 6)
• Stoneware mid to high fire, many colors buff,
  b-mix, stout, 612, S. Barbara
• Porcelain most refractory, resistant to acid,
  whitest (colors look best on) glacia,
  pier, coleman

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The difference between stoneware, porcelain,
earthenware.

• Temperature (melting point)
• Texture (grog, sand)
• Ingredients (flux, temper, colorant)
• Color
• Which is which Glacia, B-Mix, Buff,Terracotta,
  Stout

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Safety Reminders

• Wear appropriate clothing
• Minimize toxic exposure
• Use gloves or stir sticks
• Dust is the enemy.
• Use a mask
• Work in a well ventilated area (outside)
• Minimize (sand on paper, toss whole thing)
• Wet sponge as often as possible

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Techniques for successful throwing.

• 1) Clay prep
• A) Moisture not too wet, not too dry
• B) Wedging even distribution of particles
• 2) Centering
• 3) Appropriate speed control
• 4) Knowing what shape you want
• 5) Finishing piece in timely fashion

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What is a pyrometric cone?Rank coolest to
hottest -- 6, 06, 10, 04At what cone do
webisquemid-rangerakuhigh-fire?
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2) Creating Form and Surface

• Form is the shape of an object, including its
  internal space, surrounding space and negative
  space. Negative space is the space between solid
  shapes.
• The subject of the form may be abstract,
  realistic, functional/utilitarian,
  non-functional, vessel or sculpture.
• Surface treatments include texture, oxide, slip
  designs, and glaze/no glaze.