Author Topic: Oxygen scavenging caps  (Read 2102 times)

Offline brewinhard

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Oxygen scavenging caps
« on: November 04, 2016, 09:03:10 PM »
For those of you who bottle with oxygen scavenging caps, how long do you leave them in your sanitizer for?  Was having a discussion with a homebrew buddy about this today and was curious what everyone does. 

Thanks!

Offline Stevie

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Re: Oxygen scavenging caps
« Reply #1 on: November 04, 2016, 09:15:51 PM »
I put the amount needed plus a couple into a bowl of sanitizer. I'd say the shortest time is couple of minutes, longest is 10. I throw left overs away.

Offline The Beerery

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Re: Oxygen scavenging caps
« Reply #2 on: November 04, 2016, 09:20:28 PM »
Wouldn't putting them in oxygen soaked water, use the oxygen absorbing in the caps??  :o
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Offline Stevie

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Re: Oxygen scavenging caps
« Reply #3 on: November 04, 2016, 09:22:11 PM »
Wouldn't putting them in oxygen soaked water, use the oxygen absorbing in the caps??  :o
Maybe. I don't know the mechanism used or how long it takes for the reaction to take place. I sanitize as I do other caps only difference is I toss the leftovers.

Offline The Beerery

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Re: Oxygen scavenging caps
« Reply #4 on: November 04, 2016, 10:18:52 PM »
Purely speculation on my part.
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Offline denny

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Re: Oxygen scavenging caps
« Reply #5 on: November 04, 2016, 10:34:24 PM »
I've never seen any proof they work anyway.  They certainly might, but it would be nice to be certain.
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Offline a10t2

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Re: Oxygen scavenging caps
« Reply #6 on: November 04, 2016, 11:00:28 PM »
I view them as cheap insurance - maybe an extra cent per cap?

James Spencer emailed Crown years ago and their reply was that the half-life for the reaction is on the order of hours, so there's no problem soaking them in sanitizer while bottling.
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Offline Stevie

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Re: Oxygen scavenging caps
« Reply #7 on: November 04, 2016, 11:03:12 PM »
I've never seen any proof they work anyway.  They certainly might, but it would be nice to be certain.
Absolutely. I buy them when available because the price difference is pretty negligible.

When it comes to regular caps, does anybody still allow the filled bottles to "burp" a few times by placing the cap but waiting a half hour or so to crimp? I can't remember if this was from Palmer, Miller, or Charlie P, but I know it's in a book somewhere. The thought is similar to the cap on foam for counter pressure filling. I did this for a few batches ages ago, but stopped when I noticed the ping noise attracted my cats.

Offline HoosierBrew

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Re: Oxygen scavenging caps
« Reply #8 on: November 05, 2016, 12:41:41 AM »
Kelsey McNair stressed in his presentation to use them dry. I know, no sanitizer. His thinking was that the O2 scavenging gets used up when wet, so use it up when the beer hits the cap. I've done it on hoppy beers and never picked up infection. Wouldn't necessarily endorse it for most beers either. Assuming of course that they actually work.
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Offline brewinhard

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Re: Oxygen scavenging caps
« Reply #9 on: November 05, 2016, 01:02:04 PM »
Wouldn't putting them in oxygen soaked water, use the oxygen absorbing in the caps??  :o

This has been my thought which my buddy and I were discussing yesterday leading to my post on it.

But if the half-life is truly hrs, then soaking them in sanitizer for some time would not seem to make a difference.

I wish we could truly know if they are more effective.

I remember Kelsey saying that too, but I just can't bring myself to not sanitize them for some anal reason... ;)

Offline majorvices

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Re: Oxygen scavenging caps
« Reply #10 on: November 05, 2016, 03:47:29 PM »
I have been told that if you get them wet (ei: sanitizer) they activate the o2 scavenging and won't work when you put them on your bottle. I have also heard speculation that they will absorb hop aromas.

As an aside: After bottling hundreds of thousands of bottles of beers I find it cute that you guys think you need to sanitize bottle caps. Bottle caps can be considered sanitary right out of the bag/box.

Offline Stevie

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Re: Oxygen scavenging caps
« Reply #11 on: November 05, 2016, 03:58:20 PM »
I don't think I'd call caps that are repacked by an LHBS sanitary.

Offline narcout

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Re: Oxygen scavenging caps
« Reply #12 on: November 05, 2016, 04:15:28 PM »
Northern Brewer carriers oxygen absorbing caps, but the bag they came packaged in says oxygen barrier caps on it.

Are they the same product?

I've always sanitized them in an Iodophor solution, but I only bottle for the occasional competition. 
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Offline majorvices

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Re: Oxygen scavenging caps
« Reply #13 on: November 05, 2016, 04:27:18 PM »
I don't think I'd call caps that are repacked by an LHBS sanitary.

Bet you they are though. They are just pouring them from one bag to another. You guy are aware that beer spoilage organisms are actually very rare, right? The problem with sanitation in and around the brewery is that we are actually growing and selecting those "bad" bugs because of the very nature of brewing. 10 bucks says that a bottle cap never ruined a beer unless it was dropped on the floor or left open when you were milling your grain. If I drop a bottle cap on the floor it get's tossed in the trash.

Offline tesgüino

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Re: Oxygen scavenging caps
« Reply #14 on: November 05, 2016, 05:09:20 PM »
"James on Basic Brewing contacted the manufacturer to ask this very question to him. He said that sanitizing is absolutely no problem, because while the caps do absorb oxygen and are activated as soon as they get moist, it takes the caps several days to do their job, so a few minutes before getting crimped is OK."