Originally Posted by maricle
Only when I use sandpaper.
Does anyone know what temperature causes noticeable degradation? Accelerated wear testing on products is often enhanced through temperature increase, so I'm wondering if there are any studies of what heat range speeds up the breakdown of a fragrance to the point it has a readily noticed impact to the user. Though the number of bottles you rotate through has a pretty big impact on how often you pay attention to any one in particular.
Yeah, I'm sure the boiling point is a pretty nasty temperature, in case anyone wanted to bring that up
I don't think you can generalize about temperatures that fragrance breaks down. Most scents are composed of dozens if not hundreds of aromachemicals, and each will start to break down at a significant rate at a different temperature. I would guess that the manufacturers have studied each extensively and have detailed specifications for each synthetic. Naturals are combinations of hundreds of molecules, so they will vary.
I guess that perfume components are chosen such that they have a reasonable life at room temperatures and normal light exposure levels. Go beyond that, and all bets are off.
I think that light is a bigger problem. I buy a lot of vintage, and what I find is that if a bottle of perfume has been stored in its box, it is almost always good, regardless of how old it is. Topnotes may suffer if the jus is more than 30 years old, but it will still be wearable. If a 30+ year old bottle is bought without a box, it's almost always crap.