04-20-2023, 06:58 AM
The aluminum foil keeps the food warm, but placing the foil directly on the food doesn't help much. The reason behind this is, if the foil is in contact with the object, the thermal energy would move in the foil itself and might get away, but if the foil is placed a little away from the food then it can properly reflect back the thermal energy and maintain the freshness of the food. So to avoid contact between foil and food, you can add a few layers of butter paper to make air pockets and then add a pack in a final layer of aluminum foil.
As aluminum is a poor insulator, so to make the foil more effective, place it (food wrapped in foil) in fiberglass or ceramic tiffin boxes. It doesn't only keep the food warmer for longer, but also keep things cold. It acts as a barrier to oxygen and air which can transfer heat to cold or frozen food. The bottom line is it helps by maintaining the temperature of the food, be it warm or cold.
Cathy
Mobile/wechat: 86-13598417520
wade@haomeicn.com
As aluminum is a poor insulator, so to make the foil more effective, place it (food wrapped in foil) in fiberglass or ceramic tiffin boxes. It doesn't only keep the food warmer for longer, but also keep things cold. It acts as a barrier to oxygen and air which can transfer heat to cold or frozen food. The bottom line is it helps by maintaining the temperature of the food, be it warm or cold.
Cathy
Mobile/wechat: 86-13598417520
wade@haomeicn.com