Can You Microwave Cardboard?

Most of the time, takeout is delivered in paper or cardboard containers.

It took longer for the meal to be delivered to your door, and it has gotten cold. Or maybe you want to eat some of the leftovers from the night before.

You wonder if you can microwave the food with the cardboard container, instead of transferring it to a different microwave-safe container. 

Is this a safe place to reside? The bottom line is yes or no, so read on to find out why.


Is It Possible To Safely Microwave Cardboard?

If the cardboard has an indicator that it can be microwaved, it is probably safe. You can microwave cardboard if you follow certain precautions.

You need to check the cardboard item thoroughly. Read them if you find anything. Do not microwave the box if there are any signs that it should not be.

If the label says the cardboard is microwave safe, you can microwave it, but it is important to follow some necessary steps.

The product should not be microwaved if the box is made of metal or wax.

How To Safely Microwave Cardboard?

It is always a good idea to make sure there is food in the container.

It is important to make sure the container is filled with food and that the microwave settings are set to low- temperature mode.

The use of this is to eliminate fire dangers. Your cardboard should be safe to go in the microwave now that you have completed all of that.

Check the microwaving frequently to make sure it doesn’t get hot or burn. When your microwave is in use, do not leave it unattended.

Extra steps can be taken to make sure there is no danger when microwaving cardboard. If you can, layer the bottom of the container with some paper.

A napkin or paper towel can be used to cover the top of the cardboard box. The microwave will help you safely microwave your cardboard.

Is It Safe to Microwave Cardboard?

If you use microwave-safe cardboard, then you can microwave it for a short period.

To reduce the risk of overheating the cardboard, just keep it between 60 and 120 seconds and check it every 30 seconds. It is a good idea to keep your microwave in a low-power setting.

Transfer the food to another microwave-safe container if you need to heat it for a longer period. Why are you doing this?

It’s more likely to catch on fire when it’s over 400F or for a long period, because the cardboard’s moisture level drops, making it more prone to catch on fire.

Is It Possible to Microwave a Pizza Box?

Pizza boxes are safe to pop in the microwave if you have a microwave-safe label or written instructions.

Many brands make boxes that can be reheated safely, but others may include plastic or metal. The box should be in the microwave for less than a second.

Cardboard You Can’t Microwave

There are a lot of cardboard containers you shouldn’t microwave. Here are some:

  • Cardboard that has glue or adhesive. This releases chemicals into your food.
  • Cardboard which is ink printed. It releases chemicals into your food.
  • Cardboard with a lining. Wax and plastic linings release chemicals and fumes.
  • Takeout containers that have a metal handle: Hi, Chinese takeout. You cannot microwave a metal.

Here is the scoop on whether or not you can microwave paper plates and what you should know about glass in the microwave.

Tips To Microwave Cardboard

  • You can find a microwave-safe label on the cardboard. Before heating, move your food or drink to another microwave-safe dish if it is not there.
  • The food helps absorb the microwaves to reduce the risk of the cardboard catching fire, so make sure you have food in your container.
  • Line your container with a towel or napkin. This will help increase the speed at which the cardboard heats and increases the risk of fire if oils are soaked into it.
  • When heating cardboard in a microwave, make sure to keep an eye on your food.


If the label allows it, you can microwave cardboard if it doesn’t have metal or wax on it. Specific precautions should be taken to ensure safe microwaving.

Make sure the container is full, set your microwave temperature to low, and apply some other steps.

The microwave needs to be checked regularly to make sure it’s not burning or overheating. While microwaving cardboard, you will be much safer if those steps are completed.

Similar Posts