Material:

Vermeculite Clay

Sept-Dec 2016

  

Vermiculite is normally used in gardening to absorb water and take in fertile for plants. The mixture of vermiculite and clay make a lighter ceramic piece, I tried to work out the proper proportion of water, clay and vermiculite for modelling. 

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The test turns out that the liquefied clay(left) took twice more time to dry up the water while water evaporated way quicker in the mixture with vermiculite(right).