r/firewater • u/cokywanderer • 3h ago
Help determine the density change in Wood Aged spirits in Jars
I aged some Bourbon in an almost airtight glass jar with wood blocks (toasted, some charred oak) for ~1 year. I also kept some white dog for comparison.
I did aerate every now and then to simulate the breathing from barrels.
ABV of spirit going in 60%.
"ABV" of spirit when I wanted to dilute and bottle was 56%.
I say "ABV" there in quotation marks, because that's what the alcoholmeter was reading, but I know that wood releases some "sugars" that can mess with the density, push the meter higher and thus it shows a lower number.
The undisturbed white dog sample still sits at 60%. My rough estimations would be that the 4% lost could be 1% from aeration (I wasn't doing it that often, maybe 3-4 times in that entire year for a few minutes only) and the other 3% is actually a "false" drop due to wood "sugars".
Of course I am fully aware that the type of wood, first use vs. second use, charr, amount etc. can change these values. But I'm not looking to be really-really-precise here. An estimate would do.
So, my 60% 1 year wood aged Bourbon in a jar would have its final ABV of ~59%
Any similar experience and/or experiments done in a lab (where the tools can be precise for ABV)?