The safety of using glass bowls in the oven depends on the specific type of glass and its manufacturer's recommendations. Not all glass bowls are oven-safe, so it's essential to check the label or packaging for any specific guidelines or restrictions before using them in the oven.
There are two main types of glass used for kitchenware: tempered glass and borosilicate glass.
Tempered glass: This type of glass is specially treated to make it more resistant to thermal shock. Tempered glass bowls are generally safe to use in the oven, microwave, and dishwasher. They can withstand higher temperatures than regular glass but may still have a maximum recommended temperature for use. Exceeding the temperature limit can cause the glass to shatter.
Borosilicate glass: This type of glass is engineered to have a higher resistance to thermal changes and is commonly used in oven-safe glassware, such as Pyrex. Borosilicate glass bowls can handle significant temperature variations without breaking. They are designed to be safe for use in the oven, microwave, and dishwasher.
To ensure the safety of using glass bowls in the oven:
Look for manufacturer instructions: Check the label or packaging of the glass bowl for information about its oven-safe capabilities and temperature limits.
Avoid extreme temperature changes: Even if a glass bowl is oven-safe, avoid placing it directly from the oven onto a cold surface or exposing it to a sudden change in temperature, as this can cause thermal shock and lead to breakage.
Preheat the oven with the bowl inside: If the glass bowl is oven-safe, it's a good practice to place it in the oven while preheating to prevent sudden temperature changes.
Inspect for damage: Before using any glassware in the oven, inspect it for any cracks, chips, or damage that could compromise its structural integrity. Damaged glassware should not be used in the oven, as it may break during cooking.
If you're uncertain about whether a particular glass bowl is safe to use in the oven, it's best to err on the side of caution and refrain from using it in high-temperature environments. Opt for oven-safe materials like borosilicate glass or ceramic bakeware for cooking at higher temperatures.