This is the plus 100 mesh particulate from 50 grams of two different ball clays. Most of the particles are carbon, they will burn out and possibly cause glaze defects. If any of them are metallic, they will produce fired specks.
Troubles |
Specking
Specking is a fault in fired ceramic ware where speckles of ion bearing contaminants are visible and mar the appearance of the surface. |
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