What is leave film on tray do not vent?

"Leave film on tray, do not vent" is typically an instruction found on the packaging of microwaveable food products. These instructions are provided to ensure proper cooking and safety.

Here's a breakdown of what these instructions typically mean:

1. Leave Film on Tray: This indicates that the plastic film covering the microwaveable tray or container should not be removed before microwaving. The film helps to trap steam inside, which is essential for evenly cooking or heating the food.

2. Do Not Vent: Normally, venting involves poking holes or lifting corners of the film to allow steam to escape. However, if the packaging advises not to vent, it means the design of the packaging requires the steam to remain inside the tray. This may help achieve a certain texture or ensure that the food reaches the correct temperature throughout.

It's important to follow such instructions to ensure the food cooks properly and to avoid issues such as spills or improper food temperatures. Always remember to check the food's temperature before consuming, as microwaves can heat food unevenly. Additionally, be cautious when removing the film after microwaving, as hot steam can escape and may cause burns.