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Home Brew Forums > Home Brewing Beer > Brew Science > Specific gravity after brewing and after priming.
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Old 08-26-2011, 12:46 AM   #1
adamant
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Default Specific gravity after brewing and after priming.

Was wondering if anyone knew what the difference in specific gravity is before and after priming to get the proper carbonation level? I am planning on priming some cider with apple juice so I want to know what to aim for.

Thanks.

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Old 08-26-2011, 01:18 AM   #2
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What you propose sounds like carbonating with speisse. In any case, this is probably what you're looking for:
http://www.braukaiser.com/wiki/index...or_Carbonation

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Old 08-26-2011, 02:00 AM   #3
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If you are wondering how much the SG changes from finished beer versus after adding the priming sugar - the change is hardly measurable in my experience. I added 2.2 ounces to prime 4.5 gallons last night and my 1.016 was reading 1.016 after priming. I ended up measuring the SG with the dregs in the bucket for the hell of it. It's such a small amount of fermentable.

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Old 08-26-2011, 02:20 AM   #4
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I think I'll just keep trying them until I hit the carb I want then pasteurize them. I wouldn't mind some extra sweetness.

Hopefully I won't blow any up this time :/

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Old 08-26-2011, 02:51 AM   #5
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What you are doing is over my head. Best of luck!

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Old 08-26-2011, 02:54 AM   #6
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Adament, we're not quite grasping what you're asking. When I read your thread I thought like jimthehick thought, and were asking how much gravity changes when you add the 4.5-5 oz of priming sugar. Which is insignificant...like .0003% to the abv iirc.

We're just not quite sure what you are asking or looking to do. Maybe if you're a little clearer we can help you.

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Old 08-26-2011, 03:07 AM   #7
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5.5 ounces of dextrose in 5 gallons adds about 2 gravity points (both by the math and my experience) which has an alcohol potential of approximately 0.25%

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Old 08-26-2011, 03:46 AM   #8
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Quote:
Originally Posted by Revvy
Adament, we're not quite grasping what you're asking. When I read your thread I thought like jimthehick thought, and were asking how much gravity changes when you add the 4.5-5 oz of priming sugar. Which is insignificant...like .0003% to the abv iirc.

We're just not quite sure what you are asking or looking to do. Maybe if you're a little clearer we can help you.
That is what I was asking.

Thanks guys, I guess since the SG doesn't change much that wouldn't be the best measure to go by.

Like I said, I am planning on adding some juice then pasteurizing it to prevent over carb and keep a little sweetness.

I guess I was hoping for a simple guideline to go by. Maybe I will try to wrap my head around the first link posted.

Thanks for the responses.
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