Stonewares dry better than porcelains

Wednesday 9th April 2014

The plastic porcelain has 6% drying shrinkage, the coarse stoneware has 7%. They dried side-by-side. The latter has no cracking, the former has some cracking on all handles or bases (the lower handle is completely separated from the base on this one). Why: The range of particle sizes in the stoneware impart green strength. The particles and pores also terminate micro-cracks.

Pages that reference this post in the Digitalfire Reference Library:

Drying Crack, Green Strength, Particle Size Distribution, Firing Shrinkage, Drying Shrinkage, Clay Cracking During Drying

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