Causes of Glass Cracking When Holding Hot Water
Due to Thermal Shock
One of the main causes of cracked glass is thermal shock. When hot water is poured into the glass, the inner and outer glass layers have not yet adapted and expand unevenly. If the temperature exceeds the permissible limit, stress is created, resulting in thermal shock, cracking, and crumbling.
Because of Poor Quality
Poor quality products that are labeled or plagiarized by famous brands can mislead consumers. If you buy a poor quality glass, it can easily break during use. Sellers often label products with good heat resistance for the sake of profit, even if they cannot withstand heat.
Due to Improper Use
Glass is divided into four types: ordinary glass, heat resistant glass, tempered glass, and white glass. The heat resistance and bearing capacity of glass cups made from these types of glass are different. Incorrect use can lead to breakage, cracking, and wasteful disposal.
Tips to Prevent Glass from Cracking or Breaking when Holding Hot Water
Here are some tips to help prevent glass from cracking or breaking when exposed to hot water:
Boil the Glass in Boiling Water
Boiling the glass in boiling water helps it adapt to the temperature increase and expand evenly. For new glasses, place them in a large pot, fill them with water, boil both the water and glasses, then let them cool before using.
Rinse with Warm Water before Using
If you don’t have time to boil the glass in boiling water, you can rinse it with warm water. Use previously boiled water and add cold water to warm it slightly. Rinse the sides of the glass with warm water before pouring hot water into it. This helps the glass gradually adapt to high temperatures and increases its heat resistance.
Use a Metal Spoon
If your glass has uneven thickness, using a metal spoon can help reduce the risk of cracking. Place a metal spoon such as aluminum or stainless steel in the glass before pouring boiling water. The spoon acts as a temperature reducer, allowing the glass to expand without breaking.
Do Not Overfill the Glass with Water
To avoid the glass breaking or cracking, pour hot water into the glass properly. Empty any cold water in the cup before pouring hot water. Avoid overfilling the glass, as the top part is thinner than the bottom and can easily break under excessive heat pressure.
With these tips, you can better protect your glass cups from breaking or cracking when using hot water. Good luck!
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