How to prevent double-layer glass from cracking.
The reason for the explosion of the double-layer glass is that as soon as hot water is poured into the cup, the inner wall of the cup will be heated and expanded rapidly, but the outer wall of the cup remains the same. The inner glass is suddenly squeezed outwards and the cup bursts.
Let’s introduce the methods for preventing cracking, let’s take a look:
- When flushing the water, put a metal utensil such as a copper fork, aluminum spoon, etc., so that the cup will not burst easily.
- Submerge the new double-layer glass in the pot with water. Bring to a boil and take out the cup after the water cools, and the double-layer glass will not break due to sudden cooling and heating.
- Pour the cold water in the cup first, and then slowly rush the boiling water to the middle of the cup. Because the glass at the bottom of the cup is thicker than the wall, it is not easy to break.