Ceramic quality standard

about black spots or flaws and problems;
the qualified standard for daily porcelain is: the diameter of black spots is not greater2mm limit4 yes, as long as there are black spots in this range, ceramics are qualified; Ceramic products are not yes, pinholes are difficult to avoid process problems. The products sent are within the standard and will not affect the use. Please rest assured that you should purchase carefully if you mind. In addition, our ceramics pass through1280 it is fired at high temperature, and toxic and harmful substances will be evaporated at this temperature.