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ceramic double-color glazed mug cup with design How to prevent de-glaze?

Ceramic Mug    From:Xinxiang Ceramic Mug Manufacturers    
ceramic double-color glazed ceramic mug cup with design
(1) causes the glaze off?
glaze off from the pre-prime burnt body, may be high glaze plastic raw material content, shrinkage due to the large glaze.
Heating up too quickly, it could prompt a thick glaze glazed off or firing.
body stained with dirt when glazed, dust, oil, etc., can not be closely adhered to after glazing glaze body, will produce the phenomenon of de-glaze.
expansion coefficient of expansion coefficient and glaze blank incompatible, making the glaze off the glaze to produce than blank shrink too small.

(2) ways to improve:

For the glaze before firing off phenomenon, can change the glaze recipe, adding some calcined clay, glaze and appropriate to shorten the milling time.

to improve the quality of glazing, even glazing, suitable thickness, keeping the surface clean and green.
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