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Old 04-26-2009, 03:05 PM   #1
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Default Brew in a Bag Material

First, a quick intro: I've been extract brewing for 4 years now. Plans were always to go to all-grain, but I haven't gotten there yet. Being frustrated with not getting to all-grain yet, I've decided to try brew in a bag.

I went to the fabric store yesterday and picked up 2 yards of three different fabrics. I got them from the bridal fabric area, this was all a strange experience for me.

I'd like some input into if these are what I should be using and in the right way. The plan is to have a finer material inside of a less fine material, with the outer material providing some strength and carrying the weight of the grain.

So, is the fine mesh material used for straining out the grain and particulates, but not the good stuff, number one or number two?

(Coins provided for reference)

Fabric One:


Fabric Two:


Fabric Three (Outer mesh for strength):


Thanks!

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Old 04-26-2009, 03:24 PM   #2
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My Very Large Grain Bag (VLGB) has a mesh size similar to #2, maybe slightly finer. #1 would probably have clogging problems.

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Old 04-26-2009, 03:40 PM   #3
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I just noticed some of these products @ HD yesterday. I think they might work for several brewery operations. And you can stay out of the Bridal department!

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Old 04-26-2009, 03:49 PM   #4
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Number one appears to be some kind of tooling for wedding dresses. FYI, it's also the most expensive. Two yards of these three totalled about 26 bucks.

I guess I would be surprised that clogging would be a problem given the very large surface area available to drian through. The fabric passes water through quite easily.

I'll have to check out HD also.

Perhaps a small experiment is in order?

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Old 04-26-2009, 03:55 PM   #5
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I have not tried BIAB, so I cannot be of much help regarding the right coarseness for filtration. However, if you are going to double-bag, you should probably use the coarser size as the inner bag. Larger particles will not make it through the inner bag, and the smaller particles will get caught by the outer bag. This is a typical filtration method for other applications.

I would think that the strength of the double bag would be the same (or neglibly different), regardless.

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Old 04-26-2009, 04:04 PM   #6
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You spent 26 bucks on fabric? You could have bought a cooler from Walmart for a couple more bucks.

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Old 04-26-2009, 04:17 PM   #7
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I purchased polyester voile. It was on a huge roll at Michael's.
The paint strainer bag is much looser weave in comparison

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Old 04-26-2009, 05:48 PM   #8
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I asked them about voile, they were less than helpful. So that left me on my own to figure it out. I think what I got looks very similar to yours, though.

That 26 bucks should yield at least 2 very large bags, probably more. And I don't have to buy hardware either. I admit some money was wasted since I bought the 3 different types.

I may build the inner and outer bags separately, that way I can switch the inner and outer.

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Old 04-26-2009, 06:51 PM   #9
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I guess my point was that you were at least half way to a MLT already. If you went with a Denny Conn braid/bulkhead the hardware would cost about $8. I'm not saying that BIAB is bad, but you'll end up with a cooler mash tun eventually anyway.

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Old 04-26-2009, 07:05 PM   #10
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Yeah, Bobby is right. You'll end up with a mash/lauter tun out of a cooler, and in my opinion make better beer easier with the cooler. You can do it your way and make good beer however, it isn't the way I would have spent my money.

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