What is leave film on tray do not vent?

Leave Film on Tray, Do Not Vent: Information

This instruction, often found on food packaging intended for microwave heating, has two crucial components:

1. Leave Film on Tray: This refers to a thin plastic film covering the food tray. The purpose of leaving the film on is primarily to:

   • Retain Moisture: It helps to prevent the food from drying out during microwave cooking by trapping steam.
   • Even Cooking: By creating a steamy environment, it can aid in more even heating of the food.
   • Prevent Splattering: It can minimize splattering within the microwave, keeping it cleaner.

2. Do Not Vent: This is vital and directly related to the "Leave Film On" instruction. Venting the film (e.g., piercing it with a fork) defeats the purpose of the film and can lead to:

   • Loss of Moisture: Allowing the steam to escape will dry out the food.
   • Uneven Heating: It can disrupt the steam-cooking environment.
   • Risk of Burns: Removing the film immediately after cooking can release a burst of hot steam which could cause burns.

Important Considerations:

• Always follow the specific instructions on the packaging, as some may differ. Some packages may instruct you to slightly peel back a corner of the film.
• Be cautious when removing the film after microwaving, as the steam trapped underneath will be very hot.
• Never microwave food in packaging that is not specifically designed for microwave use.
• Pay attention to heating times given in the packaging.