Causes and methods of air bubbles on the surface of ceramic tableware

Reasons and methods for the generation of bubbles on the surface of ceramic white porcelin dinnerware 1. The grouting forming slurry is stored for too long and the fermentation produces bubbles. Because the slurry is too thick, the viscosity is large, the fluidity is small, the relative density is high, and the bubbles cannot be discharged. 2. When grouting, the mud is stirred too fast and the surface is uneven, air is involved, or air is involved in the process of conveying the mud to produce bubbles, and the mud is poured into the mold. The hand is too high. Entrained in air, and the pouring speed is too fast, the air can not be discharged out and concealed in the mouth or high shoulders to produce bubbles. Or because the mud temperature is too high, the surface will thicken quickly. On the contrary, if the mud temperature is too low, there will be a tendency to solidify, the fluidity will deteriorate, and the concentration will increase, and bubbles are prone to occur. 3. The model is too wet and the capillary on the surface of the model is blocked; on the contrary, the model is too dry, overheated, and the slurry suction speed is too fast, causing some air to be discharged into the blank and causing bubbles. 4. When the remaining slurry is poured, the impulse is too high, and the air is drawn into the slurry to cause bubbles in the slurry. Ways to overcome: 1. Overcome the above reasons one by one. 2. The moisture content of the grouting mold is preferably 3-5%, but the hot mold that has just been out of the drying room (or just recovered from the hot sun) cannot be grouted. It can be used after it is cooled to room temperature. The mud temperature can be maintained. The temperature is around, not too high or too low. 3. The mud must be stirred frequently and gently, but not too fast to stir up the mud.

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