Photoshop RAW vs OEM RAW software
Since Raw files consist of just the raw data off the sensor, they cannot be used or even viewed without the aid of special software that is capable of understanding this raw data and converting it into an actual photograph.
The most popular software for converting raw files would have to be Adobe Photoshop and Lightroom. Unfortunately while both do a great job with normal images they don’t have enough adjustment latitude to properly adjust the white balance from infrared images. So even you set a proper white balance in camera, once those raw files are opened in Photoshop or Lightroom the color goes back to being red, perhaps not as red as if there were no custom white balance but definitely more red than the camera intended.
Fortunately both Nikon and Canon OEM raw conversion software packages handle infrared raw files without any such issue. Even if the camera was incapable of properly setting the white balance those raw files too can be corrected.
Canon’s version is called Canon Photo Professional and is available as a free download on their website and is usually included with your camera.
Nikon’s version is called Nikon Capture NX2 and unfortunately is not included with the camera and is available for purchase as a digital download from their website or as a physical boxed disc through authorized retailers. Nikon does offer a 60 day free trial of the program on their website, at least this gives you the opportunity to try the software before purchase.
Both programs have a great white balance eye dropper tools that allow you to simple click on an area of an image to set the white balance to that spot. This allows you to experiment by clicking in various locations until you get a result you like.