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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > True or False-Grain Crush Question
View Poll Results: True or False
True 24 82.76%
False 5 17.24%
Voters: 29. You may not vote on this poll

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Old 10-04-2012, 02:57 AM   #1
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Default True or False-Grain Crush Question

True or false....

A grist that is crushed extremely fine with shredded husks will not leach tannins as long as pH, alkalinity, and temperature are at the appropriate levels.

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Old 10-04-2012, 03:11 AM   #2
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Considering some breweries use hammer mills which basically powder the malt it is true.

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Old 10-04-2012, 04:29 AM   #3
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I have to agree that this must be true. A decocotion which boils the grains will not leech tannins if the mash ph is proper so I doubt the crush would leech tannins with proper ph.

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Old 10-04-2012, 02:29 PM   #4
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If you're going to select "False" in the poll, I think you have to give us your point of view.

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Old 10-04-2012, 04:29 PM   #5
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One variable that has been left out is pressure. One of the reasons tannins are more of a concern in a commercial brewery than a home brew scenerio is the weight of the grains can create enough pressure to extract tannins at much lower temperatures than the magic 180F number.

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Old 10-04-2012, 04:33 PM   #6
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Quote:
Originally Posted by TopherM View Post
One variable that has been left out is pressure. One of the reasons tannins are more of a concern in a commercial brewery than a home brew scenerio is the weight of the grains can create enough pressure to extract tannins at much lower temperatures than the magic 180F number.
Interesting...I've never considered pressure.

So are you saying that tannins will be extracted when the grain bed is subject to pressure EVEN if pH and alkalinity are under 6.0?
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Old 10-04-2012, 04:41 PM   #7
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Quote:
Originally Posted by TopherM View Post
One variable that has been left out is pressure. One of the reasons tannins are more of a concern in a commercial brewery than a home brew scenerio is the weight of the grains can create enough pressure to extract tannins at much lower temperatures than the magic 180F number.
This may be true, but is not a concern in homebrewing.
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Old 10-04-2012, 04:42 PM   #8
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Quote:
Originally Posted by d_striker View Post
If you're going to select "False" in the poll, I think you have to give us your point of view.
3 false votes so far and no explanations!
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Old 10-04-2012, 04:45 PM   #9
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Quote:
Originally Posted by kh54s10 View Post
This may be true, but is not a concern in homebrewing.
True...I'm still interested in the theory though. His statement alludes that tannin extraction is resultant from a factor outside of pH and alkalinity which is the central question.
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