How To Test Infrared Rejection (IRR)?

Infrared Rejection (IRR) is the amount of infrared rays that are denied from going through any window film.

Of course, the IRR percentage alone is a regional measurement and cannot determine the total amount of heat that is rejected. 

There are two tools that can be used to test the IRR which are the Solar Film Transmission Meter and the Spectrum Transmission Meter.

Both of these devices can be used to calculate the percentage of the solar transmission and display IR rejection value at the same time. 

Both of these tools come with a built-in light source which re-creates the solar spectrum for the use of measuring the IRR and other components of the TSER.

It is self-calibrated and does not require any manual adjustment to operate.

The results and data of solar film that is tested will be displayed automatically.

To obtain accurate measurements, the solar film has to be placed properly and near to the sensors.

Internationally, the 950nm and 1400nm IR wavelength test point is accepted and is available in most automotive window tint in the market.

The limit of the test error is +/- 2% which is passable for customers.

Now, the reason why it is important to know how IRR is tested is due to the fact that many customers are not aware of how they can get the correct information when purchasing a car window tint.

There are numerous types of car window tints with different abilities of protection and it may overwhelm you at most times.

The information here will allow you to equip yourself with some basic knowledge as a car owner and for future references when purchasing a car window tint.