Using old Pyrex baking pans that are chipped and cracked is not safe and should be avoided. Chipped and cracked Pyrex dishes can pose several risks:
Safety Hazard: The chips and cracks create weak points in the glass, making the dish more susceptible to breaking during use. This could result in sharp glass fragments in your food, posing a serious safety hazard if ingested.
Leakage and Contamination: Cracks in the glass can lead to leakage of liquids and food between the layers of glass, making the dish challenging to clean and potentially harboring harmful bacteria or contaminants.
Thermal Shock: Cracked glass is more likely to shatter when exposed to sudden temperature changes, such as when moving from a hot oven to a cold surface or when adding cold ingredients to a hot dish.
Uneven Cooking: Chipped or cracked baking dishes may not provide even heat distribution, leading to uneven cooking and potential food safety issues.
If you have old Pyrex baking pans that are damaged, it's best to dispose of them properly and replace them with new ones. When using glass bakeware, always inspect it for any signs of damage or wear before each use. Additionally, follow the manufacturer's guidelines for proper use and care to ensure your bakeware lasts longer and maintains its safety and performance.