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jpender
Senior Member
jpender
Joined: 11 Jul 2011
Posts: 703
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Mon Jun 3, 2013, 1:51pm
Subject: Re: Aerobie Aeropress
 

That model gives us no insight into why one would choose to do a staged brew, other than for a modest improvement in economy.
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squaremile
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Joined: 6 Jan 2011
Posts: 84
Location: Portlandia
Expertise: Just starting

Posted Mon Jun 3, 2013, 10:58pm
Subject: Re: Aerobie Aeropress
 

My apologies if this has been asked before, but I couldn't find it. Does anyone use multiple filters for the AP? I have been experimenting with 2 or 3 filters at one time and by my tasting there is more clarity and less body. Curious what others have noticed.
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Netphilosopher
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Joined: 14 Jan 2011
Posts: 1,602
Location: USA
Expertise: Just starting

Posted Tue Jun 4, 2013, 5:36am
Subject: ...
 

...
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jpender
Senior Member
jpender
Joined: 11 Jul 2011
Posts: 703
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Tue Jun 4, 2013, 10:05am
Subject: Re: Aerobie Aeropress
 

Netphilosopher Said:

Personally, if I have to dilute anyways, why not dilute with some grounds rinsing water rather than just diluting with water alone?

....and maybe a bit more character.

Posted June 4, 2013 link

Oh, so it IS about economy. I thought it was supposed to be a taste improvement.

I don't dilute my AP coffee, I drink it straight at about 2%. So for me it isn't worth the extra effort just to save 10 per cup unless there is going to be a marked improvement in taste.

In terms of economy -- and assuming that the second infusion doesn't extract significantly but only rinses -- here is a graph showing the increase in yield over single infusion versus the relative size of the second water infusion for different values of "a" (wet grounds/dry coffee - 1).

jpender: stage_brew.jpg
(Click for larger image)
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jpender
Senior Member
jpender
Joined: 11 Jul 2011
Posts: 703
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Tue Jun 4, 2013, 10:09am
Subject: Re: Aerobie Aeropress
 

squaremile Said:

My apologies if this has been asked before, but I couldn't find it. Does anyone use multiple filters for the AP? I have been experimenting with 2 or 3 filters at one time and by my tasting there is more clarity and less body. Curious what others have noticed.

Posted June 3, 2013 link

I haven't tried it. It makes sense that you could improve clarity by adding filters, kind of a statistical thing I guess.

But try this instead: Press more gently. Report back.
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jpender
Senior Member
jpender
Joined: 11 Jul 2011
Posts: 703
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Tue Jun 4, 2013, 11:24am
Subject: Re: Aerobie Aeropress
 

Netphilosopher Said:

The key here is unlike what many people believe, it doesn't continue to extract, at least from what I've been able to discern with measurements of TDS% using refractometry....The point is it doesn't present evidence that it dissolves past the established equilibrium amount of TDS already dissolved.

Posted June 4, 2013 link

With your refractometer you can measure a change in concentration on the order of 1 part in 10,000. Could there be bitter compounds in coffee with taste thresholds below this concentration that continue to leech into solution undetected by your refractometer?
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squaremile
Senior Member


Joined: 6 Jan 2011
Posts: 84
Location: Portlandia
Expertise: Just starting

Posted Tue Jun 4, 2013, 7:08pm
Subject: Re: Aerobie Aeropress
 

There is a distinct different once you get to 3 filters. I use an inverted method and the plunger wants to pop off due to pressure when you flip, so hold on tight if you do it. Remarkably clear and clean cup. I always press slow (30s for the plunge and I always leave a lot in the chamber (never hear air).
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AlanAdler
Senior Member
AlanAdler
Joined: 31 Dec 2005
Posts: 708
Location: Palo Alto, Calif
Expertise: Professional

Espresso: AeroPress
Grinder: Baratza - Virtuoso
Roaster: Fresh Roast SR-500
Posted Wed Jun 5, 2013, 7:35pm
Subject: Re: Aerobie Aeropress
 

squaremile Said:

I always leave a lot in the chamber (never hear air).

Posted June 4, 2013 link

This nuance has been used by at least one winner of a World AeroPress Championship.

Can any of you describe the benefits of this, vs bottoming the plunger on the puck?

Best,

Alan

PS  The recent World AeroPress Championships in Melbourne Australia are reported here.

http://baristamagazine.com/blog/?p=7796

Click Here (sprudge.com)
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MrMug
Senior Member


Joined: 29 May 2013
Posts: 5
Location: Middle America
Expertise: I like coffee
Posted Thu Jun 6, 2013, 7:03am
Subject: Re: Aerobie Aeropress
 

I can definitely see where double pumping/stage brewing is superfluous with medium to darker roasts. I've tried that and it does seem a little over-extracted.

But I'm telling you it definitely pulls out better flavor notes on lighter roast coffees, which, when single-staged, are certainly extraordinarily smooth, but lacking a bit in character. I think this is because darker roasted coffees are apt to give up their oils quicker since they've been roasted longer, whereas lighter roast coffees need a little more finesse.

In any event, it's easy and fun to experiment with this little marvel. And everyone can easily find their own favorite techniques based on their grind and palette proclivities.
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jpender
Senior Member
jpender
Joined: 11 Jul 2011
Posts: 703
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Thu Jun 6, 2013, 7:07pm
Subject: Re: Aerobie Aeropress
 

squaremile Said:

There is a distinct different once you get to 3 filters.

Posted June 4, 2013 link

In appearance or taste or both? I think I recall Netphilospher posting that two filters didn't make that much of a difference versus just one.

squaremile Said:

I always press slow (30s for the plunge and I always leave a lot in the chamber (never hear air).

Posted June 4, 2013 link

I meant gently as in VERY low force. Just barely above gravity.
The time it takes can vary a lot and by itself means nothing.

For example, when I replicated Alan's stock AP recipe it took me over a minute to press.


edit:

I did a quick experiment. I made 5 cups of coffee (recipe: 13g at LIDO 1.5 grind, 200g of water at 93.5C, quick stir, 30s steep, then press):

(#1) Able Disk standard, 99 second press
(#2) 1 paper filter, 38 second press
(#3) 2 paper filters, 42 second press
(#4) 3 paper filters, 44 second press
(#5) 1 paper filter, 94 second press

Visual clarity: Virtually indistinguishable. Each was just a little cloudy.
Taste: All five cups were pretty good with little difference between them.


So what is the recipe you have been using along with those three paper filters?
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