Why do glass have bubbles

Generally, the raw materials of glass are fired at a high temperature of 1400 ~ 1300 ℃. When the glass is in a liquid state, the air in it has floated out of the surface, so there are few or no bubbles. However, most of the cast glass artworks are fired at a low temperature of 850 ℃, and the hot glass paste flows slowly. The air between the glass blocks can not float out of the surface and naturally forms bubbles. Artists often use bubbles to express the life texture of glass and become part of appreciating glass art.

Post time: Sep-13-2022