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avaserfi
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Posted Thu Apr 8, 2010, 8:11pm
Subject: Re: Aeropress filter: Poly vs Swiss Gold vs?
 

Part 9317T153 25 for $14.02.

Would that work well?
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glennk
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Posted Fri Apr 9, 2010, 9:34am
Subject: Re: Aeropress filter: Poly vs Swiss Gold vs?
 

For anyone considering the poly felt route, over on Green Coffee Buying Club they are collaborating to produce some pre-cut, food grade polyfelt filters. I'm guessing more interest would be welcome, since the material comes in VERY large rolls. Someone already has the machine to cut them precisely. It sounds like it's just a matter of getting enough interest to justify the cost and effort.
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MikeX
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Grinder: Baratza Maestro
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Posted Fri Apr 9, 2010, 1:01pm
Subject: Re: Aeropress filter: Poly vs Swiss Gold vs?
 

glennk Said:

For anyone considering the poly felt route, over on Green Coffee Buying Club they are collaborating to produce some pre-cut, food grade polyfelt filters. I'm guessing more interest would be welcome, since the material comes in VERY large rolls. Someone already has the machine to cut them precisely. It sounds like it's just a matter of getting enough interest to justify the cost and effort.

Posted April 9, 2010 link

THANK YOU!!!!!!!!!!!!!

That is exactly what I need; someone else to do the cutting :)

I will login and check it out.
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andys
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andys
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Posted Fri Apr 9, 2010, 6:38pm
Subject: Re: Aeropress filter: Poly vs Swiss Gold vs?
 

randytsuch Said:

Wondering why you picked 270 mesh?

Is that the mesh size that the gold filters use?

They also have 200 mesh, in 2 9/16 diameter circles.  The Aeropress filters are 2.5 in diameter, but for some reason they don't have 2.5 in, just 2 9/16.

Posted April 8, 2010 link

I believe 270 is the finest mesh available before the price takes a jump, but certainly one can go finer. The finest meshes are rather fragile, though.

Don't know the hole size of gold filters (which are built differently than the wire cloth that McMaster sells). Clovers, by way of comparison, use relatively coarse 70-100 mesh filters.

Mcmaster will quote special orders. You could call them and ask for a quote on 2.5" circles in whatever mesh size you desire. They will go back to the manufacturer and try and get it for you.

 
-AndyS
picture page:  http://flickr.com/photos/andy_s/sets/
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andys
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Posted Fri Apr 9, 2010, 6:40pm
Subject: Re: Aeropress filter: Poly vs Swiss Gold vs?
 

avaserfi Said:

Part 9317T153 25 for $14.02.

Would that work well?

Posted April 8, 2010 link

It'll work fine after you trim it down to size.

 
-AndyS
picture page:  http://flickr.com/photos/andy_s/sets/
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MikeX
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Posted Thu Apr 15, 2010, 5:57am
Subject: Re: Aeropress filter: Poly vs Swiss Gold vs?
 

So I got my Swiss Gold knock off in the mail and I cut a filter out of one side. I've used it a few times and I like it but can't say it's better than the paper filter. The real test will be when my new Baratza grinder comes in on Monday and I can get a proper grind. I am surprised that I'm not getting much mud in the bottom of the cup with a whirly grind. I suspect it will be almost a no-mud cup with the new grinder.

I also have a few new coffees coming from Sweet Maria's so I'll be in super coffee nerd mode for the next couple of weeks.
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PeaberryPicker
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PeaberryPicker
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Posted Thu Apr 15, 2010, 6:49pm
Subject: Re: Aeropress filter: Poly vs Swiss Gold vs?
 

There is a good reason why you don't get as much dust in the liquid (compared to French Press).  A bed of coffee grounds collects at the bottom of the Areopress, and acts a little like a log jam, or beaver dam.  Dust in the coffee has difficulty migrating through the bed, and mostly gets trapped on one side of the coffee bed.  So the coffee becomes it's own filter.

In French Pressed coffee, the filter comes down from the top.  Coffee grounds begin to sink earlier on in the steep time, gravity is pulling them down,  and there is much less coffee blocking the passage of dust through the screen and into the liquid.

Most any non paper filter method does a better job of separation than the French Press (Vac/Siphon pot, gold cone, Areopress with metal screen, even a percolator).

Check out this macro for a good look at where the fines end up resting in the Areopress.
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MikeX
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Posted Thu Apr 15, 2010, 7:19pm
Subject: Re: Aeropress filter: Poly vs Swiss Gold vs?
 

Wow, that's an amazing pic. No question where the fines go now :)

Although I haven't done back to back cupings, the gold filter in the Aeropress is almost like a cross between a paper filter Aeropress and a french press which is pretty much what I wanted. The couple of times I tried a french press it seemed a little to "dirty" of a cup. But, that was using coffee ground with a whirly so I should probably try again when I get my Baratza.
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SEC
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Joined: 13 Feb 2010
Posts: 51
Location: New York, NY
Expertise: I live coffee

Posted Thu Apr 15, 2010, 8:30pm
Subject: Re: Aeropress filter: Poly vs Swiss Gold vs?
 

andys Said:

I believe 270 is the finest mesh available before the price takes a jump, but certainly one can go finer. The finest meshes are rather fragile, though.

Don't know the hole size of gold filters (which are built differently than the wire cloth that McMaster sells). Clovers, by way of comparison, use relatively coarse 70-100 mesh filters.

Mcmaster will quote special orders. You could call them and ask for a quote on 2.5" circles in whatever mesh size you desire. They will go back to the manufacturer and try and get it for you.

Posted April 9, 2010 link

You could order any size filter paper or metal sieve that you like from a scientific supplier like Fisher, down to 20 microns (632 mesh).  Specialized filters finer than this exist but I don't know of metal sieves that are finer.  It would be interesting if someone ordered a bunch of different size sieves and did a detailed comparison.  I assume this type of thing is done regularly inside big coffeemaker manufacturers.
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IMAWriter
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IMAWriter
Joined: 4 Jul 2002
Posts: 5,891
Location: Brentwood, TN
Expertise: I live coffee

Espresso: Bezzera Strega
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Posted Thu Apr 15, 2010, 9:21pm
Subject: Re: Aeropress filter: Poly vs Swiss Gold vs?
 

avaserfi Said:

Do you do any soldering or work to the edges to prevent fraying? or just cut and go?

Posted April 6, 2010 link

I don't believe solder is anything you'd want in contact with higher temp liquids and/or food sources prior to entering your oral cavity.
At least I wouldn't.

 
Rob J (LMWDP #187)
My Music Production web site:
www.robertjason.com
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