For those who insist on trying hypersenitization the easiest method is exposure to a very dim green light for an extended period of time. The method most often described is the use of a Kodak Brownie safelight with the green cup. A 7 watt bulb is used and half of the cup is covered with black tape. IIRC, the film is exposed at a distance of 8 to 10 feet for a period of several minutes. Afterwards the film is respooled for use. As I mentioned before every film is different and the method must be tweeked for each film.