1- Channel mixer adjustment:
- Create a Channel Mixer adjustment layer.
- From the Preset dropdown, select Black & White Infrared (RGB).
- Leave the Green value as it is (200%) as this creates most of the effect, but play around with the Red and Blue channels to get something that looks good.
- Here I set the Blue channel to 0% and the Red channel to -60%.
That’s it! That’s the only step needed for this particular case.