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Old 04-21-2011, 02:01 AM   #1
JWest
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Default Full boil AND late extract addition?

I just got the necessary equipment to do a full boil. Also, I've done three batches, and with every batch I followed the instructions and boiled the entire amount of extract with 2.5 gal of water for the full 60 minutes. I've just now done the research on the benefits of late extract addition and would like to do that as well.

My question is: does it make sense to do a full 5 gal boil and do the late extract addition as well, or should I just pick one or the other and go with it? If I do a late extract addition, what is the recommended amount to add late (15 min left)? I've seen some people recommending only using 20% of the extract for the full hour, while others recommend boiling half of the extract for the full hour and adding the rest at 15 min.

Thanks in advance for the help!

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Old 04-21-2011, 02:38 AM   #2
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I'm a newby myself, but my understanding is that the late extract addition is going to give you a light color, with ask the benefits of the fermentable sugars. Idont think it is going to matter whether or not it is a full or partial boil. If anything, the full boil should give you less risk of infection. Good luck.

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Old 04-21-2011, 04:03 AM   #3
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You'll want some added gravity for your boil so you can bring the pH down a bit, that will prevent you from getting astringent or tannin flavors from your hops. But there's no precise amount that you will need, as in 20% or 50%. I do partial mashes, so I just wait until knockout and add all of my DME then. There's no reason to boil the late addition extract at all, but if you want to do it at 15 mins or so, that's fine too. You'll have slightly better alpha acid isomerization with the lower gravity boil, so you might tone your hop schedule down ever so slightly, but personally I've never noticed much of a difference.

I would definitely suggest doing late extract addition for any brewer, regardless of boil size. You'll get a color that's closer to what you were shooting for and, like I said, outside of the gravity you get from the extract, there really is no reason to boil your extract since it was already boiled in it's creation.

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Old 04-21-2011, 04:04 AM   #4
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I put all the extract in at flameout

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Old 04-21-2011, 04:05 AM   #5
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Lighter... It should be. Risk of infection, I have not had.

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Old 04-21-2011, 05:42 AM   #6
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Full boil negates the purpose of the late extract addition.

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Old 04-21-2011, 02:26 PM   #7
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Quote:
Originally Posted by Malticulous
Full boil negates the purpose of the late extract addition.
That was kind of what I was thinking, so it's why I asked the question. I don't see any harm in doing both, though. Seems like it would make the beer just a little lighter in color.
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Old 04-21-2011, 02:35 PM   #8
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Everyone says that late additions make the beer lighter but I haven't found that:

http://www.homebrewtalk.com/f14/my-n...arison-236005/

Does anyone else want to do their own test and compare results? I'm thinking of redoing my test eventually to do it the proper way and actually boil the water for 60 minutes with adding the extract at the 10 minutes left mark - this way the boil off should match and give a much more accurate result. But since it would take twice the time I just did my experiment with a 60 minute boil and a 10 minute boil, but the results are still very interesting.


Rev.

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Old 04-21-2011, 03:12 PM   #9
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Quote:
Originally Posted by Rev2010 View Post
Everyone says that late additions make the beer lighter but I haven't found that:

http://www.homebrewtalk.com/f14/my-n...arison-236005/

Does anyone else want to do their own test and compare results? I'm thinking of redoing my test eventually to do it the proper way and actually boil the water for 60 minutes with adding the extract at the 10 minutes left mark - this way the boil off should match and give a much more accurate result. But since it would take twice the time I just did my experiment with a 60 minute boil and a 10 minute boil, but the results are still very interesting.


Rev.
Yeah, my understanding is that a partial boil can sometimes caramelize the extract, giving it a darker color than anticipated, while late addition extract simply doesn't get any darker. So it isn't that the beer is lighter than normal, rather no darker than normal. However, if you aren't doing a 60 minute rolling boil with 2 gallons of water along with your extract, the caramelizing might be much less pronounced, so you might not see much difference. The less water and the hotter the boil, the more caramelizing you will get.

The other benefit, at least in my experience, is you get better attenuation, I assume because there is less caramelizing, which can also reduce the fementability of your sugars.

The biggest reason I do late extract addition at flameout is because I am using an electric ceramic top stove and it just takes forever to return to a boil, so I steep my grains in 2.5 gallons of water, then just use that for the boil. Plus you do get better hop utilization. You can either reduce your hops or use them later for more flavor addition.

I guess it is a bit "risky" not boiling the extract at all; essentially you are trusting the manufacturer and supplier to have not introduced any bacteria, etc, but I have not had any problems in the last 5 batches doing exactly that. I just don't want to wait 45 mins for the wort to return to a boil
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Old 04-21-2011, 03:19 PM   #10
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Quote:
Originally Posted by JWest View Post
I just got the necessary equipment to do a full boil. Also, I've done three batches, and with every batch I followed the instructions and boiled the entire amount of extract with 2.5 gal of water for the full 60 minutes. I've just now done the research on the benefits of late extract addition and would like to do that as well.

My question is: does it make sense to do a full 5 gal boil and do the late extract addition as well, or should I just pick one or the other and go with it? If I do a late extract addition, what is the recommended amount to add late (15 min left)? I've seen some people recommending only using 20% of the extract for the full hour, while others recommend boiling half of the extract for the full hour and adding the rest at 15 min.

Thanks in advance for the help!
It depends on what benefits you are after. If you want better hop utilization, then yes.

If you are trying to avoid caramelizing your extract, then it's probably redundant, as the extra water will help prevent that, though I imagine if you got a full boil rolling for 60 minutes, you might get some caramelizing, just much less than in a partial boil.

If you have a nice burner, then you might add it in at 15 minutes (that's what brewtarget is setup for late addition calculations). That will also make sure the extract gets one last bit of pasteurizing before it goes in. I just do it at flameout to avoid the delay in returning to a boil, due to the limitations of my stove top.

Brewtarget is nice because you can specify which ingredients go in "late" and get a reasonable estimate of your hop utilization.
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