Special films

There are some special-interest films which can produce effects that are difficult to achieve in any other way. One of the most interesting is ‘infra-red’ film, which captures the heat given off by objects as well as the light that they reflect. Kodak’s High-Speed Infra-red black and white film is a well-known example. It reproduces blue skies as near-black but vegetation and human faces have a strange, ethereal glow.