I'm setting up a cheap home studio and want to get a single background for portrait shots to keep costs down. The room is currently way too bright as it is rather small for the purpose and with all white rooms. How dark a background should I get to allow the most flexibility in creating a background of any color and brightness with a gelled flash?
Am I right in thinking that I should go for something close to black, as I don't want the lighting of the subject to turn my background too bright for low key shots, but it is possible to turn even a "black" background quite bright with a flash pointing directly to it at high power?
Specifically, I'm looking at http://www.photography-backgrounds.co.uk/Photography-Background-Papers/1.35-x-11-metres.html and their differnt types of grays/blacks.