d_striker

Recipes 

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.

TimT

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Considering some breweries use hammer mills which basically powder the malt it is true.

BrewinHooligan

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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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d_striker

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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.

TopherM

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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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d_striker

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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?

kh54s10

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This may be true, but is not a concern in homebrewing.

kh54s10

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3 false votes so far and no explanations!

d_striker

Recipes 

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.