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Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > How do you do a full boil?
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Old 12-04-2012, 12:33 AM   #21
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Related question: If I'm doing extract kits and following the recipe except I'm doing foil boil, how will my batch differ from what it's supposed to taste like? Should I be modifying the recipe if I do full boil of a partial boil extract kit?

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Old 12-04-2012, 01:01 AM   #22
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Originally Posted by metanoia View Post
Right, right, I keep thinking they're something like whirlfloc tablets in my mind. I don't see myself seeking out some Fermcap until I start getting boil overs. I hope careful attention when the brew kettle is at full capacity helps make it a long time until I have to spend $6 on a vial of that.
Once you start using it, you won't want to be without it again.

I bought a half liter (~17 oz) of it for $20. Those little 1oz dropper bottles are profit centers for the brew shops that repackage it.

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Old 12-04-2012, 01:15 AM   #23
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That 2oz bottle will go a long way though. Considering how you use the dropper in the cap, and 1-3 drops per gallon (depending on where/when you use it) it tends to last a good long time. Unless you're brewing 10 gallon batches, every two weeks (or more).
My renewed vigor for brewing has be brewing 5 gallon batches once a week... maybe I should invest in some!
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Old 12-04-2012, 01:23 AM   #24
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Related question: If I'm doing extract kits and following the recipe except I'm doing foil boil, how will my batch differ from what it's supposed to taste like? Should I be modifying the recipe if I do full boil of a partial boil extract kit?
As long as you add the majority of the malt extract (or all of it) near the end of the boil, it can only get better.

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Once you start using it, you won't want to be without it again.

I bought a half liter (~17 oz) of it for $20. Those little 1oz dropper bottles are profit centers for the brew shops that repackage it.

Dang, that's crazy. Would one of the 1oz bottles be good to keep around so you can use the dropper, or is there an easy way to extract just a few drops from the big half litre bottle?
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Old 12-04-2012, 01:24 AM   #25
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Related question: If I'm doing extract kits and following the recipe except I'm doing foil boil, how will my batch differ from what it's supposed to taste like? Should I be modifying the recipe if I do full boil of a partial boil extract kit?
No. There is some belief that doing a full boil may impact hops utilization, and some brewing software would calculate it that way but except for very very low IBU (under 20 IBUs) that hasn't been my experience at all. For a cream ale or light lager where you want to make sure you don't have even a 5 IBU difference, you may want to reduce the bittering hops 20%, but for the rest there isn't any need.
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Old 12-04-2012, 01:30 AM   #26
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No. There is some belief that doing a full boil may impact hops utilization, and some brewing software would calculate it that way but except for very very low IBU (under 20 IBUs) that hasn't been my experience at all. For a cream ale or light lager where you want to make sure you don't have even a 5 IBU difference, you may want to reduce the bittering hops 20%, but for the rest there isn't any need.
Thanks for letting me know. I never brew anything that low in IBUs.

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As long as you add the majority of the malt extract (or all of it) near the end of the boil, it can only get better.
I've been following the recipe and putting it at the start of the boil. I've seen a few mentions of that. Why would you do that?
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Old 12-04-2012, 02:04 AM   #27
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Thanks for letting me know. I never brew anything that low in IBUs.

I've been following the recipe and putting it at the start of the boil. I've seen a few mentions of that. Why would you do that?
Adding the bulk of the extract at the end of the boil means a less "cooked extract" taste in the beer, as well as keeps a lighter color for the final beer. In my experience, it makes a better beer especially when doing a partial boil of less than 6 gallons or so in the boil.
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Old 12-04-2012, 02:18 AM   #28
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^ What she said. It's what Palmer advised when I read How to Brew, and it still seems to be the most popular consensus. Since the extract was already boiled before being heavily concentrated, you don't technically need to boil it at all. The last 10 minutes of the boil should be more than enough to make sure the extract is sterilized enough for fermentation, just to be safe. You could just boil water for the first 50 minutes in order to get your hop utilization in, though I typically put 1/3 to 1/2 of the extract in to start.

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Old 12-04-2012, 03:18 AM   #29
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Thanks guys.

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Old 12-04-2012, 11:20 AM   #30
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Laying a spoon across your kettle will reduce boil overs too. The spoon will "pop" the foam of the boil. It works...

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