Does Aluminum Foil Block Thermal Imaging 2022

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Thermal imaging involves the process of improving object visibility. This happens through detection of the infrared radiation an object emits. An image is produced depending on the information available during the entire thermal imaging process.

The thermal imaging concept is based on infrared energy or the heat an object produces. There is increased emission of infrared radiation whenever there is an increase in the temperature of an object. The thermal camera employs this infrared radiation to produce a more visible image of the object. But then, can any object block thermal imaging? Does aluminum foil block thermal imaging?

Can You Block Thermal Imaging

Yes, several objects and elements can block thermal imaging. Surfaces where thermal cameras can’t see through include the walls, concrete, metal, and glass, among others. However, thermal cameras can see through smoke, fog, rain, dust, blowing sand, snow, mist and fog, and several other things. Some plastics possibly allow thermal cameras to see through, and others don’t. The thickness of the plastic is a dependable factor in this case.


Does aluminum foil block thermal imaging? We shall get all information about this material in our post and whether it is capable of blocking thermal imaging.

Does Aluminum Foil Block Thermal Imaging?

Several objects and elements can block thermal cameras to see through. Few can block and, at the same time, allow the thermal cameras to see through them. An example of this is plastic. The thickness of the plastic material determines whether thermal cameras can see through or not. Does aluminum foil block thermal imaging?

Yes, aluminum foil is capable of blocking thermal imaging. But then, how does this happen? First, we all know that aluminum is an electricity conductor. This way, the aluminum foil forms a Faraday cage barrier that can stop radio waves from passing through it.

You still can’t believe it? Let’s look at an example to test the ability of aluminum foil to block thermal imaging. In your experiment, you will need a large aluminum foil, a cell phone, and allow time to see results.


Set the cell phone on the aluminum foil sheet and wrap it well all through like a gift. Ensure you wrap them completely, whereby no part is left unclosed or visible.

Use another phone to make a call and get the experience. You will realize that the phone is unreachable. So, what is behind this experience? The aluminum foil shields signals from nearby objects and cellular towers to reach it. This material forms a powerful shield to block all non-ionizing radiation from reaching your cell phone.

You can use this experiment on any device that either produces or receives frequencies to function. You will prove that they won’t work when wrapped in aluminum foils. The usage of aluminum is employed for several applications to create barriers to these radiations from reaching people.

An example of aluminum foil application includes its alignment in the microwave. This kitchen appliance has an aluminum sheet that shields radiations from coming outside. This way, they are maintained inside so that users don’t get exposed to them.

When using aluminum foil for this purpose, the thickness of the material doesn’t matter at all. Both the super thin and thick aluminum works best to block thermal imaging. The only thing that will allow thermal cameras to see through the aluminum foil is holes in the metal sheet. Holes larger than the shortest wavelength of radiations can allow thermal imaging radiations to pass through.

But then, does aluminum foil absorb the radiations after blocking them? Thermal imaging radiations travel in straight lines. They are only blocked using an object that doesn’t allow the radiations to pass through them directly. You need to know that metals such as aluminum foil don’t absorb the radiations after blocking them throughout the blocking period.

Whenever you are using aluminum foil to block thermal imaging, always stay careful. This is, for instance, if you have any object that emits radiations like Wi-Fi. Emitted radiations are bounced back and forth. They are later amplified and accelerated. Correct usage of aluminum foil will ensure that thermal imaging radiations are kept off. This prevents exposing any device or yourself from such rays.

We have gotten the information that aluminum foil can block thermal imaging. Also, these materials deflect thermal camera radiations, unlike other materials that absorb it. But then, how do aluminum foils block the thermal imaging radiations?

Thermal imaging radiations travel in straight lines. Therefore, if you need to protect any device from these radiations, you must cover the device entirely with aluminum foil. If there is little space for penetration, these radiations will bounce back and amplify inside. They will later leak through any hole in the aluminum foil.

The number and size of holes on the aluminum foil determines how effective it is in blocking rays. The fewer the holes, then the foil stands powerful to block thermal camera radiations. Coverage and integrity play an important role overall. Adequate coverage of the device is what determines the effectiveness of the blocking project at hand.

Another accurate way to tell whether your aluminum sheet is blocking thermal imaging effectively is using an EMF meter. These are essential gadgets that your aluminum foil is doing a great job. They are more satisfying to measure the capability of certain materials for blocking thermal imaging.

Wrapping It Up

Does aluminum foil block thermal imaging? Aluminum foil is an affordable metal material that works well for both residential and industrial projects. It has been clear that this material is capable of blocking thermal imaging. It creates Faraday cages that prevent penetration of thermal camera radiations to devices.

Besides this, the aluminum foil doesn’t absorb the thermal imaging radiation it blocks; it instead deflects them off. Employ aluminum foils to block thermal imaging radiations that are emitted from any object.

Richard Bevill

Author - Richard Bevill

Hi, I am Richard Bevill, I am a businessman and tech-blogger. I have a shop where I sell different types of thermal image cameras and their related accessories. Because of my business, I have to face so many clients of thermal image camera users. During my business hours, I find that many of my clients face difficulties with uses, maintenance, not getting the exact amount of service, buying the wrong one. All those problems they face because of their lack of knowledge about thermal image cameras. 

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