
Originally Posted by
tommyj1986
Hey sounds like an interesting infusion. I did a much more basic one recently, using orange peels in some FR, I was real happy with it.
Disclaimer, I am not an expert, but my understanding is the way hydrometers work is by measuring density. Since alcohol is less dense than water the less dense a mixture the higher proof it would show. By adding solids, perhaps they increased the density in addition to some of the alcohol being absorbed into the fruit. The addition of sugars and such from the fruit would cause the hydrometer no longer to be accurate. I would guess that the proof went down, but probably not as much as the hydrometer indicates.
For proofing items with sugars typically you need a proofing still or an ebulliometer.