Cokin P003 Red

Almost completely suppresses blue and green. The Cokin Red filter should be used to create dramatic contrast: A blue sky becomes almost black, starkly setting off light with a green landscape. In landscape photography it increases contrast in cloud formation dramatically. Haze is reduced and white surfaces appear brilliant. In portraiture skin appears porcelain white.

Using a red filter when shooting portraits in B&W gives an interesting look, however be sure that your subject isn't to blond - or wearing virtually no makeup. That will result in a washed out look. And remember - lipstick cannot be totally red.