The Brew Bag Blog — hop spider

Brew In A Bag Video Series by The Brew Bag founder Rex Slagel

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Brew In A Bag Video Series by The Brew Bag founder Rex Slagel

We've seen a good many videos showing how to use a fabric filter to brew in a bag, but there aren't any that detail why this works so well. Here you'll find a bit of science along with some practical information to make great beer in about 3.5 hours using minimal equipment. 

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Brewing Process Logic - A Comparison of Methodology

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When using a fabric filter and the full volume of mash water without sparging, the gravity is set when the mash is complete - unless adjusting for volume in the kettle or the fermenter - it is never diluted. In addition the pH is fixed in both the mash tun and the kettle. The entire sparge process can be eliminated, saving time, effort, equipment and energy expense. The use of one kettle, one burner, and one bag with no mash out produces comparable results to sparging.

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The Brew Bag vs Paint Strainer and Muslin Bags.

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About every fourth person I speak with asks why the The Brew Bag is better than a paint straining bag, or why not just get the two pack nylon bag from their local home brew store, or why not just use a muslin bag, "that's what the steeping brew kits come with". So here's the straight up on bag material and why Voile is the best.  Paint strainer bags are made of nylon and have a thread count of 45. Thread count is measured in a square inch both vertically and horizontally. Paint strainer bags have 9 threads vertical and...

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Hop Spider VS The Brew Bag

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The utilization is influenced by the vigor of the boil, the total gravity of the boil, the time of the boil and several other minor factors. The vigor of the boil can be considered a constant for each individual brewer, but between brewers there probably is some variation. The gravity of the boil is significant because the higher the malt sugar content of a wort, the less room there is for isomerized alpha acids. The strongest bittering factors are the total amount of alpha acids you added to the wort, and the amount of time in the boil for isomerization. Understandably then, most equations for IBUs work with these three variables (gravity, amount, and time) against a nominal utilization. As mentioned earlier, the utilization for alpha acids in homebrewing is generally accepted as topping out at about 30%.

 

http://www.howtobrew.com/section1/chapter5-4.html

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