Smoke

I was just clearing my lightroom database and I came across this one so I posted it, I haven't done one of these for a while, it's a really easy technique, I shot this at f11, 1/250 iso 200. I used an off camera flash to light it from the side. This is shot on a black background, just a piece of card should do it then all you need to do is invert the colours when you process it, ie black becomes white etc. Colour can be added as an overlay or by playing with your white balance settings and the hue/saturation layers. I also have a rainbow tinted smoke trail on my site from the same shoot as this.