Membership questions? Log in issues? Email info@brewersassociation.org
Quote from: denny on June 11, 2014, 04:20:33 pmQuote from: Kinetic on June 10, 2014, 04:34:45 pmTannins from sparging can be from a high sparge water pH or from sparge water that is too hot or both. I sparge with 175F water always. The mash pH is 5.0-5.5. The sparge water pH is 5.5.Not sure where tannins from mashing occur, but I mash at 1.5qts/lb. Tannins have never been a problem for me.Water temp plays almost no role in tannin extraction. It's all about pH. Ever heard of a decoction mash, where you boil the grain? That's obviously significantly hotter than 170, but you don't get tannins because the pH is low enough to be safe.There are plenty of books written by brewing scientists and pro brewers that don't agree with your assertion. Their consensus is tannins are more soluble at sparge temperatures above 170F and more tannins are extracted at higher temperatures.That doesn't mean a tasty beer can't be made using hotter sparge water. Taste is subjective. Every beer has tannins. Some beers have a lot more than others and still taste good. Some lambic brewers sparge with 200F water, but they are considerably more tannic than a typical American pale ale.I agree that a high pH is more problematic than a high sparge temperature.
Quote from: Kinetic on June 10, 2014, 04:34:45 pmTannins from sparging can be from a high sparge water pH or from sparge water that is too hot or both. I sparge with 175F water always. The mash pH is 5.0-5.5. The sparge water pH is 5.5.Not sure where tannins from mashing occur, but I mash at 1.5qts/lb. Tannins have never been a problem for me.Water temp plays almost no role in tannin extraction. It's all about pH. Ever heard of a decoction mash, where you boil the grain? That's obviously significantly hotter than 170, but you don't get tannins because the pH is low enough to be safe.
Tannins from sparging can be from a high sparge water pH or from sparge water that is too hot or both. I sparge with 175F water always. The mash pH is 5.0-5.5. The sparge water pH is 5.5.Not sure where tannins from mashing occur, but I mash at 1.5qts/lb. Tannins have never been a problem for me.