Longetivity VS Quantity of Juice in the Bottle

i agree with that. have had some bottles with just a ut of fragrance in the bottom, and when I had not used the for a while, they seemed to be spoiled when I reached for them again.

Theoritically it sounds good....However i dont have any bottle thats used more than 10% ....so it would be a while before i could corroborate this theory

gupts

Would that mean that splash bottles are more vurnable to spoilage as air is let in every time the cap is removed?

Yes. Splash bottles seem to prone to expire faster that the sealed atomizers. Its not a problem if you use them alot, but if you let a tiny bit sit at the bottom for a while out on your counter it might spoil. At least that is my experience.

I think this theory could be true. I've noticed that most of the bottles that I have which have gone off a little are those that are less than 75% full. It could be that those bottles are the ones I used more of because they are older and come from the time when I had a smaller rotation-- whereas now I have so much stuff that anything I buy never gets below the 85% mark.

It's likely to be like what you're thinking. But there is always an exception, my small bottle (11 ml) of Polo Sport (splash), is still good after 10 years. Really amazing! While Fahrenheit, which was bought at the same time and at the same size, has already gone bad.

It's a scientific principle... longevity is proven to be proportional to the quantity left in the bottle. That is to say, when the quantity decreases, longevity decreases.

Actually, no, that's just me being a dork. I think I just want it to last longer near the end - if that were true, I wouldn't use as much, and I would run out slowly! Wishful thinking. But maybe there's actually something to it!

I wouldn't really know, because I have enough juice that I can't run out! I can only run out of samples and decants. But even they last awhile in my house.

Cheers, Dave

Or, you could consider decanting the remains of any lower level fragrance bottles into 10ml or larger decant containers and fill them to the very top, thereby reducing the oxygen level the liquid is exposed to over time. I do that with larger buys of expensive extra virgin olive oil--pour it into clean, dark and smaller bottles and refrigerate to keep it fresh longer.

The alcohol content of most EdT's especially seem to me to be higher than the EdP's and therefore theoretically should have more longevity IMO, but constant exposure of the contents of any bottle to an exchange of air would bleed off the alcohol evaporate faster. Splash bottles in particular would do this as oxygen is constantly being exchanged as you use it, compared to the constantly increasing (as liquid levels decline) but still relatively captive air in spray/roll-on bottles.

kbe,
Doesn't that beg the question? As far as I know, alcohol, being highly volatile, burns off very quickly, helping distribute scents, and leaves other substances behind to continue to produce fragrance.

And continuing that thought, the EDP, with a larger percentage of actual fragrance (the other substances), should last longer, other things being equal. That's what I thought, anyway.

And if that's not true, doesn't that make it sort of pointless to have an EDP formulation, if the EDT will produce scent longer?

Cheers, D

We are talking about the alcohol/air interface inside a closed container and the amount of alcohol molecules that will move from the surface of the fragrance into the enclosed (small) volume of air, some of which is already at the saturation point with said fragrance molecules and not how long a scent lasts when applied? If so I suspect that small volume of air would reach capacity very quickly and not deplete the alcohol until a huge volume of unsaturated air had contacted the liquid over time.

I don't think that an area of enclosed air that is not constantly being 100% or high-volume exchanged will bleed off alcohol to a great extent unless it is totally exchanged for alcohol-free air often. I could be wrong but it seems to defy what I understand of physics to think it would.

As for the EDP formulation lasting longer than the EDT--when applied-- I think we are in agreement that it is the oils/individual fragrance component percentage in EDP that does that and not the carrier/solvent (alcohol). But inside a closed container some of the volatile oil and fragrance goes into molecular mix along with /change of air, the alcohol and so the fragrance should lose some of its character after time with increased air exposure. Decanting to smaller, fuller and thus less air contact containers should delay this loss of character.

kbe,
Ah, I totally misread the premise, which was that you were talking about the activity inside the bottle, not outside. I follow you now, albeit in a less scientific fashion. I failed in my reading comprehension test this time!

Hell, just apply more sprays! In that way, you'll use up the bottle quicker and can buy a fresh bottle sooner.

I have a very near empty bottle of Bvlgari Black & a full back-up bottle. I've had the near-empty bottle for about a year & a half, & the back up bottle for about a month or so. I sprayed one squirt from each bottle on the back of each hand. For what it's worth, I couldn't tell a difference between the smell on either hand.