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Pres

Pkqw: Week 22

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Week 22

 

  1. There is a traditional method which can be used to make the procelain body more workable and give it more strength for throwing larger forms. It is achieved by ____________ the body for more plasticity and by adding __________________ which is made of the same material as the body itself for more strength.

    1. wedging, sand

    2. aging, porcelain grog

    3. blunging, porcelain grog

    4. aging, stoneware grog

  2. _______________ if bad can cause shivering of the glaze and/or cracking of the pot due to the stress between the contraction of glaze and clay body-use a different glaze.

    1. Porosity

    2. Shrinkage

    3. Plasticity

    4. Glaze fit

  3. As in the case of the ash glazes it was the ancient Chinese potters who first discovered the _________________.

    1. Thixotropic clay

    2. glaze stains

    3. slip glazes

    4. salt firing

  4. _____________________ can be substituted for rutile if the tan color is not a necessity to the glaze.

    1. Titanium oxide

    2. Ilmenite

    3. zirconium oxide

    4. tin oxide

 

This weeks questions come from The Potter's Complete Book of Clay and Glazes, by James Chappell, c. 1977, Watson-Guptill Publications

 

 

Note from Pres: Of all of my books over the years, when I have had a problem with clay, or glaze, this was the book I returned to often. If you have it you are lucky, if you don't. . . look for it.

 

 

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2 (I am guessing here because of the tradition)

4 - cracking of the pot due to the stress between the contraction of glaze and clay  is that dunting?

3 (what is a slip glaze? using the slip as a glaze and letting the ash from the kiln settle and create the shine or did they add ash into the slip?)

2

Edited by preeta

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