Lots of old 35mm film produced before 1950 contains nitrate. Around 1950, these nitrate films were replaced by acetate film because of the fire hazard. On projectcest.be you will find a comprehensive manual that can help you identifying nitrate films.
Film lasts long when storage conditions (such as temperature and humidity) are right. With acetate film, ‘vinegar syndrome’ is a problem. When this occurs, the film starts to deform slowly and a vinegar smell emerges. Nitrate film can turn into dust or into a sticky, flammable paste. Let alone the damage fungi or rusty storage boxes can do…
Check out our storage tips.