Original photo. Taken with a Canon 5D, Hoya R72 filter.
Load raw image into Adobe Camera Raw.
Set temperature to 2000K.
Set curves to Strong Contrast.
Save as PSD file.
The result after raw conversion.
Open PSD file in Photoshop.
Add channel mixer layer.
Set Red channel to 0% Red, 0% Green, 100% Blue.
Set Blue channel to 100% Red, 0% Green, 0% Blue.
Result after swapping red and blue channels. Notice how the colors are starting to separate.
Add a Hue/Saturation layer. Set Hue to +87.
Result after hue adjustment. There are now distinct yellows and reds.
Hit CTRL-ALT-SHIFT-E to create a merged layer.
Do any corrections such as sharpening, healing tool, cloning, etc.
Add another Hue/Saturation layer.
Completely desaturate red channel.
Result after desaturation.
Result after contrast adjustment.