It has become quite normal for people in Britain to utilise microwaves when reheating their food or quickly preparing their meals within minutes. However, there has always been the nagging worry about whether it is possible to use aluminium foil when using the microwave. Some people say that it is extremely dangerous, while others argue that it does not harm at all. Actually, you can use aluminium foil when using the microwave, but that is only possible under certain conditions.
How safe is aluminium foil in food preparation: Is it safe to go in the microwave
To comprehend whether aluminium foil is safe for use in the microwave, it is essential first to understand what microwaving entails. Microwave ovens rely on electromagnetic waves to heat up food, which results from exciting the water molecules in the food being heated. However, metal is not capable of absorbing these waves but instead reflects them.As per the findings in the study ‘Risk Assessment of Using Aluminium Foil in Food Preparation’, “microwaves cannot pass through metal.” In other words, when food is completely covered by aluminium foil, it will be poorly heated. Even more concerning is the interference that may occur when the electromagnetic waves are reflected.Yet, it would be incorrect to suggest that all aluminium foil use is harmful. Microwaving of food items packed in aluminium foil trays… is absolutely safe if done right.As this example demonstrates, aluminium foil is not the issue; rather, improper use is.
What you must check before using aluminium foil
However, the most vital aspect to be considered while placing aluminium foil in the microwave oven concerns its shape and orientation. The smoothness of the foil is significantly more important than people may think; in particular, if the foil is crumpled or contains sharp points, it allows for the formation of regions where there is an accumulation of electric charges.Sharp edges or points… can result in arcing, damaging either the oven itself or even resulting in fire.Size, on the other hand, is another important parameter: it is generally safe to use small pieces of aluminium foil to protect certain parts of the food, such as meat edges. However, covering a substantial part of the dish or enclosing it completely with aluminium foil hinders the penetration of microwaves into the oven and thus leads to energy accumulation inside it.Orientation is also extremely important; in particular, the foil should not touch the interior of the oven. When it does, the microwaves reflecting off it are concentrated in one spot, leading to an enhanced likelihood of sparks. In case sparking is observed, it is recommended to turn off the oven and remove the foil.The simple question here is whether the foil is smooth, sparingly used, and kept at a safe distance from the walls. If not, then it doesn’t belong in the microwave oven.
Why is aluminium foil potentially harmful in the microwave
There is no need for chemical hazards or toxic contamination because the risk is purely physical. Since metal reflects microwave radiation, it produces uneven distribution in the oven, leading to electrical activity in some cases. The latter manifests itself in the form of sparks.Sparks not only cause a visual alarm; they damage the lining of the microwave and shorten its useful life. In the worst-case scenario, the sparks can set fire to the surrounding parts if the foil is excessively crumpled or folded.On the other hand, there is a possibility that the food will be heated unevenly due to the inability of microwaves to penetrate metal objects. Thus, the food wrapped in aluminium foil may turn out to be poorly cooked and potentially dangerous if reheated.
Using aluminium foil in the microwave: Final thoughts
If you have ever been unsure about adding aluminium foil to your microwave, it is because your intuition was right. This is one of those times when it pays to be cautious because there are many benefits that may be achieved with proper precautions and careful consideration.However, if you find yourself questioning whether the aluminium foil should be added, chances are that using the alternative method will be much easier. It saves you from any unnecessary stress and guarantees you that you will not be staring at the sparks inside the microwave waiting for your food to cook.
