Welcome back to Todays Outline Room tour TAKE NOTES Stages of Clay Firing Stages of Clay Wedging Clay Success Rates will my work survive the elements Recycling Clay How to look at Ceramics ID: 412566
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Slide1
ceramics 1 & 2
Welcome back toSlide2
Today’s OutlineRoom tour (TAKE NOTES!)Stages of ClayFiring Stages of Clay
Wedging ClaySuccess Rates (will my work survive the elements?)
Recycling Clay
How to look at Ceramics
Take home article: Peter Christian Johnson
or
Saskia
DeteringSlide3
Room TourWheel area with cabinet space and toolsStudio workspace and cabinets and toolsWindow spaceBisque and glaze shelvesClay mixing areaGlaze area
Kiln Room and firing temperaturesSlide4
Stages of ClaySlipPlasticLeather HardGreenware (Bone dry)Bisqueware
Stoneware or Glazed ProductSlide5
Stages of ClaySlip
The
elements and components
of clay with excessive water. Can be poured and has the consistency of
really
thick soup.
Used to cast objects in plaster molds or during the scoring process Slide6
Stages of ClayPlastic
Clay body is unstable, very moldable, and has excessive water still
Best example: clay on the wheel, pulled handles for cups, or recycled claySlide7
Stages of ClayLeather hard
Feels like smooth leatherClay
body is stable, but still slightly malleable
Ideal for slab building, trimming a foot on a bowl or pot
Slipping and scoring additional pieces can happen at this
process
Sgraffito
(drawing on clay) can happen at this stageSlide8
Stages of ClayBone Dry (Greenware)
Clay is completely dry
Extremely fragile and could break easily
Nothing can really be done to your piece at this point.
Clay must be bone dry before being recycled!!
Ready to be
Bisqued
Slide9
Stages of ClayBisqueware
Clay has gone through a Cone 06 firing process
Is more durable than
Greenware
, but not by much
Water has evaporated from the clay body (vitrified)
Has a pinkish hue
Ready to be glazed!Slide10
Stages of ClayStoneware
Stoneware is the name of the clay we are usingOur clay is fired at Cone
10 (About 2381 degrees
Farenheit
).
A lot of shrinking has taken place, so your piece will be smaller
Food safe (Depending on the glaze!)Slide11
Firing ClayBisque FireGlaze FireSlide12
Firing Clay
Once Greenware is Bonedry, it goes in the kiln
We fire at Cone 06 (1830 degrees
Farenheit
)
Art can be stacked or placed inside one another during a bisque firing
We’ll talk about stacking and temperature schedules on our fist bisque fire.Slide13
Firing Clay
Open kiln during the bisque fire. This firing was opened at about Cone 06
Not a good idea to open kiln after it’s reached 1,000 degrees.
Extremely hot
Can crack artworkSlide14
Firing Clay
Bisquare is ready to glazeWe’ll talk more about glazes when the time comesSlide15
Firing Clay
After glazing our work, we load it into the gas kiln The advantages to gas kiln glazing, is greater control over the atmosphere inside the kiln.
There are 3 types of firing (reduction, neutral, and oxidization)
We only do reduction firings in this course
Oxidation: an abundance of oxygen in the kiln atmosphere
Reduction: an abundance of carbon in the kiln atmosphere
Basically, we’re reducing oxygen. Slide16
Firing ClayObject during cone 10 glazingSlide17
Firing ClaySlide18
Wedging DemoWedging removes air from the clay bodyRemoval of air bubbles is important, so your work doesn’t crack or explode in the kiln!Slide19
Success RatesSlide20
Success RatesThe survival of your piece depends on how well you take care of it.It cannot contain: air bubbles, cracks, super thin or thick wallsThin walls will crackThick walls will explode in the kiln!
Wall sizes should be 1/8 to 1/4 inch. 1/2 at the
most for large pieces.
Not all pieces will survive, that’s why it’s important to make multiplesSlide21
Success RatesManufacture success rates are above 90%Little room for errorProfessional Artists are about 50-75%
Mine: about 50-70% or 50 out of every 90 – 100 pieces madeI experiment A LOT
Your rates: likely 25-70%
It all depends on how well you construct and take care of your work!Slide22
Recycling Clay Demo
Clay in this form is called “Reclaim”
Needs to be mixed with dry clay and ran through pug mill to use again
Do not put leather hard clay in reclaim bucket!
Let clay get bone dry before putting in this bucket!Slide23
How to look at and critiqueVSSlide24
Elements of ArtLine : a mark made with length and direction.Shape : a two-dimensional area that defines and establishes contour.
Form : the quality of being three-dimensional.Space : that which is around and between shapes and forms.
Value
: the degree of lightness and darkness.
Color
: the response of vision to wavelengths of light; the presence of pigment.
Texture
: the quality of a surface, actual or implied.Slide25
Principles of ArtUnity : quality of visual wholeness or oneness.Contrast : a sharp difference of size, shape, color, value, or texture.
Variety : using diversity to create interest.Emphasis : stressing or calling attention to some part of an artwork, creating a focal point.
Movement
: using the elements of art to direct the eye through a composition.
Balance
: equal visual weight.
Pattern/Repetition
: the use of an element of art more than once.
Rhythm
: repetition of visual movement.Slide26
How to look at and critiqueVSSlide27
How to look at and critiqueSlide28
How to look at and critiqueSlide29
How to look at and critique