nworth
Member
It depends on a lot of things - humidity, air flow. the film, etc. In general, let it hang until it is dry. In a humid area like yours, overnight is not unreasonable. Around here (7 percent humidity a lot of the time), 3 hours often works, although it is more like 5 during monsoon season. Some people use special film drying cabinets or tubes with forced warm air flow for more rapid drying.