Author Topic: What is the purpose of splitting up LME in boil  (Read 368 times)

Offline Belgian Samurai

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What is the purpose of splitting up LME in boil
« on: January 15, 2018, 05:00:03 PM »
Good morning!
While reading different articles, forum threads and recipes yesterday, I read someone's comment that they split up the LME in the boil. (Sorry, I don't remember where I read that.) They would pour in half of it as usual, but would save the other half for later in the boil. What is pro's/con's of that method?

Thanks,
Shad
(Note: Thus far, these have been LME kits from the store. I want to be comfortable with the foundationals first.)
Recent batches: Belgian Trippel, California Steam Ale
On tap: Grapefruit IPA
In the works: pending
On the drawing board: Hard Apple Cider, Cocoa Maple Strong Dark Ale

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Re: What is the purpose of splitting up LME in boil
« Reply #1 on: January 15, 2018, 05:10:08 PM »
It is usually done when doing a partial boil. For example, making a 5 gal batch but only boiling 3 gal and then topping up with 2 gal of water.
By reducing the specific gravity of the boiled wort, the hop utilization is increased and the darkening of the wort is reduced.
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Offline Belgian Samurai

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Re: What is the purpose of splitting up LME in boil
« Reply #2 on: January 18, 2018, 04:53:22 PM »
It is usually done when doing a partial boil. For example, making a 5 gal batch but only boiling 3 gal and then topping up with 2 gal of water.
By reducing the specific gravity of the boiled wort, the hop utilization is increased and the darkening of the wort is reduced.
Ah, okay. Thanks! We've been talking about your answer this week and since we don't know how much difference that makes, sometime this Spring, we want to do two boils side by side for comparison. Should we buy two 5-gal batches or would the test results be sufficient if we were to simply split up a 5-gal LME brew kit?
(Note: Thus far, these have been LME kits from the store. I want to be comfortable with the foundationals first.)
Recent batches: Belgian Trippel, California Steam Ale
On tap: Grapefruit IPA
In the works: pending
On the drawing board: Hard Apple Cider, Cocoa Maple Strong Dark Ale

Offline denny

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Re: What is the purpose of splitting up LME in boil
« Reply #3 on: January 18, 2018, 05:10:26 PM »
It is usually done when doing a partial boil. For example, making a 5 gal batch but only boiling 3 gal and then topping up with 2 gal of water.
By reducing the specific gravity of the boiled wort, the hop utilization is increased and the darkening of the wort is reduced.
Ah, okay. Thanks! We've been talking about your answer this week and since we don't know how much difference that makes, sometime this Spring, we want to do two boils side by side for comparison. Should we buy two 5-gal batches or would the test results be sufficient if we were to simply split up a 5-gal LME brew kit?

Splitting one kit would actually be better to ensure that the wort composition is exactly the same.
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Offline Belgian Samurai

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Re: What is the purpose of splitting up LME in boil
« Reply #4 on: January 18, 2018, 05:14:27 PM »
Splitting one kit would actually be better to ensure that the wort composition is exactly the same.

Great to know! Thanks for the clarification.  8)
(Note: Thus far, these have been LME kits from the store. I want to be comfortable with the foundationals first.)
Recent batches: Belgian Trippel, California Steam Ale
On tap: Grapefruit IPA
In the works: pending
On the drawing board: Hard Apple Cider, Cocoa Maple Strong Dark Ale

Offline BrewnWKopperKat

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Re: What is the purpose of splitting up LME in boil
« Reply #5 on: January 18, 2018, 10:14:15 PM »
Going back to your original post, if you're looking at continuing with extract-based brewing for a while, you may want to get a copy of the 4th edition of How To Brew.  There is a lot of good information on the 'hows' and 'whys' of partial boils and late extract addition.  Chris Colby also writes about late extraction additions here: http://beerandwinejournal.com/late-malt-extract-addition and in his new (Dec 2017) book.

If you are thinking of experimenting with SRM in those extract batches, here are a couple of links that may be helpful:

edit: fixed broken 3rd link.
« Last Edit: January 18, 2018, 10:42:23 PM by Brew'n w Kopper Kat »

Offline Belgian Samurai

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Re: What is the purpose of splitting up LME in boil
« Reply #6 on: January 18, 2018, 10:26:06 PM »
Going back to your original post, if you're looking at continuing with extract-based brewing for a while, you may want to get a copy of the 4th edition of How To Brew.  There is a lot of good information on the 'hows' and 'whys' of partial boils and late extract addition.  Chris Colby also writes about late extraction additions here: http://beerandwinejournal.com/late-malt-extract-addition and in his new (Dec 2017) book.

If you are thinking of experimenting with SRM in those extract batches, here are a couple of links that may be helpful:
Thanks for those resources! I glanced at them and will look at them in more detail soon. BTW, the 3rd link you mentioned was a dead link.
(Note: Thus far, these have been LME kits from the store. I want to be comfortable with the foundationals first.)
Recent batches: Belgian Trippel, California Steam Ale
On tap: Grapefruit IPA
In the works: pending
On the drawing board: Hard Apple Cider, Cocoa Maple Strong Dark Ale

Offline BrewnWKopperKat

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Re: What is the purpose of splitting up LME in boil
« Reply #7 on: January 18, 2018, 10:44:44 PM »
...  BTW, the 3rd link you mentioned was a dead link.

Fixed (and thanks for letting me know). 

Offline Belgian Samurai

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Re: What is the purpose of splitting up LME in boil
« Reply #8 on: January 18, 2018, 10:49:08 PM »
...  BTW, the 3rd link you mentioned was a dead link.

Fixed (and thanks for letting me know).

Awesome! Thanks. It looks like a fun read. =:)
(Note: Thus far, these have been LME kits from the store. I want to be comfortable with the foundationals first.)
Recent batches: Belgian Trippel, California Steam Ale
On tap: Grapefruit IPA
In the works: pending
On the drawing board: Hard Apple Cider, Cocoa Maple Strong Dark Ale