Author Topic: Beer darkening with oxidation  (Read 1435 times)

Offline natebrews

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Beer darkening with oxidation
« on: March 28, 2017, 11:04:14 PM »
I saw this tonight and thought I would share it.  The glass is the beer that I brewed, maybe 2 months ago and the gallon jug is the harvested yeast from when I transferred to the spunding keg. 

They were stored next to each other in the keg fridge (what they are sitting on).  The jug just had the foil on it and the keg was under CO2 (duh).

Anyway, I thought it was interesting. 

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MaltMaker

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Re: Beer darkening with oxidation
« Reply #1 on: March 28, 2017, 11:25:12 PM »
That is interesting.  What does the harvested yeast beer taste like?!?!....

Offline natebrews

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Re: Beer darkening with oxidation
« Reply #2 on: March 28, 2017, 11:36:10 PM »
Oh, I didn't taste it.  I just noticed it in there when I opened up the fridge to do something and thought I would share.  I can take a taste of it later (after the little gremlins stop climbing all over me).
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Offline natebrews

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Re: Beer darkening with oxidation
« Reply #3 on: March 29, 2017, 12:24:53 AM »
Smells of wet cardboard and something like sherry.  Honestly, what the aroma reminds me the most of is some maple wine that I tried making many years ago.  Terrible, but similar nose.

Taste is wretched.  Maybe mushroom, paper, and some other bad stuff.  There is a sweet thing in there too but it is far secondary to the other favors.  Sticks around in the back of the mouth too. 

« Last Edit: March 29, 2017, 12:29:06 AM by natebrews »
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Offline majorvices

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Re: Beer darkening with oxidation
« Reply #4 on: March 29, 2017, 12:29:18 AM »
Not surprising but very cool comparison, thanks for posting! (And actually, it is just a little surprising it darkened that much.)

Offline The Beerery

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Re: Beer darkening with oxidation
« Reply #5 on: March 29, 2017, 01:15:39 AM »
I have watched wort darken like that during mashing( not to that extent, but go from bright pale to dull oxidized apple color). It's a real thing folks. ;)


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Offline stpug

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Re: Beer darkening with oxidation
« Reply #6 on: March 29, 2017, 01:15:51 AM »
Not surprising but very cool comparison, thanks for posting! (And actually, it is just a little surprising it darkened that much.)

Totally agree.  I've never seen that stark of a difference between same-beer samples.  I'd expect some darkening, but that goes from straw to brown!!  :o

Offline The Beerery

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Re: Beer darkening with oxidation
« Reply #7 on: March 29, 2017, 01:18:08 AM »
Herr, wirf Hirn vom Himmel!
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Offline natebrews

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Re: Beer darkening with oxidation
« Reply #8 on: March 29, 2017, 02:35:48 AM »
Not surprising but very cool comparison, thanks for posting! (And actually, it is just a little surprising it darkened that much.)

Totally agree.  I've never seen that stark of a difference between same-beer samples.  I'd expect some darkening, but that goes from straw to brown!!  :o

I think the lighting and camera are making it look a bit more extreme than it does in real life, but only by a bit.  The fact that it is in a very wide container is also exaggerating the effect.   
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Offline natebrews

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Re: Beer darkening with oxidation
« Reply #9 on: March 29, 2017, 02:38:28 AM »
Here is more of an apples to apples comparison.

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Offline duelerx

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Re: Beer darkening with oxidation
« Reply #10 on: March 29, 2017, 04:16:40 AM »
This is impressive, i've seen some posts in other forums of how people get darkening on some of their IPAs after some dry hop, maybe this is one of the reasons.

Offline The Beerery

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Re: Beer darkening with oxidation
« Reply #11 on: March 29, 2017, 11:42:36 AM »
That's correct.  In one of the recent Ü articles he dryhops during fermentation and the resulting beer is lighter in color than the normal dryhopped one, and can't figure why.....Derp!


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Offline Joe Sr.

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Re: Beer darkening with oxidation
« Reply #12 on: March 29, 2017, 04:07:19 PM »
Here is more of an apples to apples comparison.



This is about what I've seen.  I kegged a beer years ago, shook to carbonate, and then realized I hadn't purged the head space.  It was darker immediately.  And had a weird pink tinge to it.  Nasty.
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Offline HoosierBrew

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Re: Beer darkening with oxidation
« Reply #13 on: March 29, 2017, 10:51:25 PM »
Here is more of an apples to apples comparison.





That looks pretty comparable to the color change I've noticed with my beers FWIW.
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Offline Andor

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Re: Beer darkening with oxidation
« Reply #14 on: March 30, 2017, 05:10:41 PM »
Here is more of an apples to apples comparison.




Wow thanks for posting