Fired deformation comparison between two porcelains

Sunday 14th June 2015

These bars were fired at cone 10, they were straight when dry. The back one is a cone 10 Grolleg body, the front one is a cone 6 Grolleg body. This simple test is valuable to determine susceptibility to warping in porcelains. If the pyro-plastic deformation is too much, for example, the weight of a handle will pull the round rim of a mug into an oval shape, for example.

Pages that reference this post in the Digitalfire Reference Library:

PPD Pyroplastic Deformation, PCE Pyrometric Cone Equivalent, Two bars ready for pyro-plastic comparison test, Warping

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