Defect: Opening is non-circular, easy to crack | ceramic bowl
Cause: 1)main issue is the ceramic material formular is incorrect as hard to shape, and easy to warp during fire in kiln; 2)not enough dry time to wait for shape completely before fire in kiln.
Solution: 1)amend material formular; 2)go to kiln after semi-bowl dry completely; 3)MUST inline inspection for 1st batch of product.
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