Sunday, February 21, 2010

Size Matters

Ever have the experience that something comes out of the kiln and you look at it in amazement......it looks so much smaller? We all have I am sure. Shrinkage is something that we need to account for regardless of what we are making. Whether is be tiles, a coffee cup, a platter or a free form sculpture - size matters.

There is a chart next to the door to the kiln room that has the %shrinkage based on various scenarios. Several things effect how much something shrinks:
  • Clay body
  • Type of piece you made
  • How much did it get stretched
 


Below are the figures from our supplier. Use your own experience and typw of piece to adjust your own calculations.

C/4 Ox. C/6 Ox.
112 BROWN CLAY
Shrinkage: 12.5% at C/6.


C/4 Ox. C/6 Ox.
553 WARM BUFF CLAY
Shrinkage: 12% at C/6.

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