Is it normal for glass products to have bubbles?

It is normal for bubbles to appear in glass products during production, and there are three reasons for this: firstly, the temperature of the glass directly interferes with the adhesion and surface tension of the glass solution, as well as the solubility of gases in the glass solution; The second is time. If the disappearance time of bubbles is not sufficient, the bubbles will eventually be left in the double-layer glass to form bubbles; The third is oxidation-reduction. There are many vertical temperature distribution curves formed in the double-layer glass cup, which cause the glass liquid to form two large circulation convection. The size of the melting rate, fluctuations in the discharge amount, fuel distribution and combustion flame organization, glass oxidation-reduction state and other factors will significantly affect the temperature level and stability of the hot spot area.