Coloured Studio Backgrounds with Rosco Strobist Gels
Light is like water - both are boring
until you put something in them.
From LIDLIPS by Syl Arena
Colour reinforcing relies on projecting light onto a background which is the same colour as the background i.e. red light onto a red background and blue light onto a blue background etc.
Basically, a white background reflects all wavelengths of light in the visible spectrum. Hence the pale blue colour when white light is projected onto a cobalt blue background.
Remember - Generally, more power less colour - less power, more colour.
This the set up I used for these images. The model is Fred. Fred stood at the last minute as the booked model failed to turn up. Fred is easy to work with; he's easy going, doesn't break for hair & make-up or the odd fag! He is clean shaven and doesn't suffer with skin shine. Best of all he doesn't bitch about how long the shot is taking or want to get away early because he's going to meet a cute fella;-)
This blog is an introduction to this technique. I've prepared a detailed PDF file that you may download here.
Good luck and don't forget to experiment as much as possible. The more you practice, the better you'll be. If you have any questions feel free to post them in the comments section below.