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Topic: AeroPress experiment for AP addicts (17 msgs / 390 lines)
1) From: sci
Here's my most recent experiment and the results with the vaunted AeroPress.
I figured that one reason the AP made such good coffee was the pressure
factor. So I found a way to play with that and got some interesting results.
1. Get some Chemex filters. They are really thick and perhaps the finest
paper filter. Cut out a circle the same size as the AP filters. Put the
Chemex filter in the AP. The thicker paper creates more resistance. If you
don't have Chemex filters, try using two AP filters, but I find that
overkill.
2. Put the coffee and water in as usual and begin pressing.
3. As you press, more pressure is required due to thicker filter. Now, press
firmly, and then stop. Repeat... Repeat... This press/stop action is easy
and, I theorize, makes water enter the grinds under pressure and then exit
as the pressure stops. It is kind of pumping water in and out of the
grounds. I only do it about 5-6 times to avoid over extraction. I have even
tried to put a little vacuum action on the grounds by backing up the
plunger, but this is very tricky. If you do it even slightly too much, air
enters from the bottom and the filter gets unseated. So I don't recommend
it.
4. Cup quality seems improved to me with more flavor. I have tried this on
several beans and it creates a deep and rich cup, more so than the straight
press with plain filter using same bean and grind and dilution.
Well, it may sound crazy. But I experiment with just about everything.
Now I'm looking for an old Swiss Gold filter to cut up and stick in there...
Ivan
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2) From: Dennis & Marjorie True
Sounds like you need a poly filter for your AP use that inverted method 
and see how that cup compares.
Dennis
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3) From: MichaelB
Ivan,
The results don't sound crazy, just the reasoning :-).  I have no doubt your
coffee tastes different, but IMO it is not due to increased pressure. You
are increasing extraction time and agitation of the grounds. More than
enough of a change to account for the deeper, richer taste. Seems like
you've found a good balance. Increase those two factors too much and you may
get unwanted tastes.
On 4/14/08, sci  wrote:
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MichaelB
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4) From: sci
Michael,
I haven't increased the brew time. I pour and bloom for 10secs; finish
pouring and stir for 10secs; steep 5secs; do the pulse plunge for 20secs
with about 5 or 6 pulses. I don't want to over extract.
I believe pulsating pressure actually forces water into the grounds and then
out as pressure subsides . The extraction process of espresso drives water
through the grounds not around them. The grounds are very porous and
pressure can drive the tiny molecules of water into the pores. Well, that
may sound crazy, but it works for espresso allowing a deep quick extraction.
The AP platform allows less pressure, maybe 15-20psi (I push down pretty
hard and let up and the surface area of the plunger is about 3 inches
squared). If you have an AP try using two filters and try it. The cup is
incredible. I just did Yem. Shirasi C+ and it was phenomenal. I did it
earlier today with IMV / Sidamo DP and it was intoxicating. But, I'll give
credit to the beans for that; they rock.
Ivan
On Tue, Apr 15, 2008 at 10:15 AM, <
homeroast-request> wrote:
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5) From: MichaelB
 OK. You asked for it. More than anyone ever wanted to know about the
aeropress.http://www.coffeegeek.com/forums/coffee/machines/195166BTW, the aeropress inventor, Alan Adler, hangs out there and will answer any
and all posts about aeropress and method. Check with him and report back
here. Also, our own Scott Marquardt, aka rasqual, hangs out there too. He
pioneered the inverted method and the use of polyester filters. IMO, for
real coffee lovers, he is a better source of information about all things
aeropress than Alan
Start reading. See you next month :-).
=====
On 4/16/08, sci  wrote:
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MichaelB
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6) From: Bill
Oh come on Michael, there's only 154 pages, 10 posts per page.  ha ha...
wow, that's a lot of posts...bill
On Thu, Apr 17, 2008 at 5:58 AM, MichaelB  wrote:
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7) From: Bill
Well, I'm home sick today with laryngitis... 2nd time in 2 months.  You'd
think I'd learn to keep my mouth shut when ill!  oh well, I've been roasting
some coffee, and reading CG's AP discussions.  Very interesting and amusing.
 I'm 1/4 of the way through the posts.  WOW!  So thanks, Michael... actually
a lot of good info there.
Oh, and reading about the AP made me want to go make a cup.  I've only used
this as a way of making coffee on the road, I've never actually messed with
it to make a phenomenal cup of coffee... which I'm gonna start to try!  Good
stuff!
bill
On Thu, Apr 17, 2008 at 5:58 AM, MichaelB  wrote:
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8) From: MichaelB
bill,
Of course you lost your voice. You shouldn't have read all those AP pages
out loud. There is some very good information in there but yes, you have to
wade through lots of noise to get to it.
I use the AP on the road too, but never at home. I always use the inverted
technique, even with paper filters. The biggest variable for me is
temperature. About 200 degrees. About 20 grams of coffee for about 12 oz
water. Grind fine with zass. Dump grinds into AP. Add water to halfway mark.
Wait for bubbling to subside. Stir gently with wooden stir stick (not the
supersized AP paddle). Fill to top of AP with water. Stir gently again.
Attach cap and filter. Start to press till foam on top. Then quickly flip
over onto preheated mug and press the rest of the way down. I find that the
harder you press the harder it is to press. Press more gently and it flows
better. Then fill mug with remaining water. Finally start sipping. These
past few days alternating cups between the deep, brooding pungency of Moka
Kadir and the bright, refreshing bursts of Kenya Gethumbwini. Which one do I
like better? The last one I had.
On 4/17/08, Bill  wrote:
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MichaelB
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9) From: Bill
I shoulda known!!!  Next time I'll just move my lips.
Yeah, I'm gonna start experimenting with inverting the AP...  I still
haven't fine tuned it, but like I said, I didn't really give it much thought
before.  Just a way to make coffee on the road.  I need to work to make the
BEST coffee on the road I can... so I'm learning a lot in that thread.
 Thanks for your method.
happy roasting!
bill
On Fri, Apr 18, 2008 at 9:31 AM, MichaelB  wrote:
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10) From: Coffee
I haven't been terribly impressed with the AP so far. It makes a good  
cup of coffee, but not as good as several other methods... I'll try  
your inverted process see if that makes a difference.
Thanks,
-Peter
On Apr 18, 2008, at 8:31 AM, MichaelB wrote:
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11) From: sci
I'm not sure what I've been doing wrong with AP. I'm not getting the
mediocre results some lament.  I was a hardcore FP user for 10 years
running. I carried a small FP everywhere I went around the world and refused
to drink drip, and I suffered endless ridicule from the coffee philistines
who think coffee is just a caffeine delivery system. Well, when I got my AP,
such awesome cup results bounded from my mug that I hardly ever use the FP
anymore. I reach for the AP even at home. So what am I doing wrong? Bad
results happened once and that was because of a friend's poor grinder that
ruined 30grams of precious IMV. The inverted method has a flaw for a
particular reason that nobody discusses (I'm very picky about my coffee
((aren't we all))). My repeated experience with AP, notwithstanding days of
perusing coffeegeeks AP forum, is that using a very thick filter (Chemex or
two filters), amping up the pressure in a pulsating cycle, while keeping
total brew time to 45 seconds, 175-180F spring water, a little finer than
drip grind=a killer mug of coffee that outcups FP. YMMV
Ivan
Date: Fri, 18 Apr 2008 10:24:39 -0700
From: Coffee 
Subject: Re: [Homeroast] AeroPress experiment for AP addicts
To: homeroast
Message-ID: <0A3EEF62-30A5-47AB-995B-5E1280B813B1>
Content-Type: text/plain; charset-ASCII; format=flowed; delsp=yes
I haven't been terribly impressed with the AP so far. It makes a good
cup of coffee, but not as good as several other methods... I'll try
your inverted process see if that makes a difference.
Thanks,
-Peter
On Apr 18, 2008, at 8:31 AM, MichaelB wrote:
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12) From: MichaelB
Ivan,
What is this flaw of the inverted method that nobody discusses? Inquiring
AP'ers want to know,,,
On Sat, Apr 19, 2008 at 2:03 AM, sci  wrote:
     
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MichaelB
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13) From: Bill
Alright, I just have to brag.  I finished all 156 pages of CG's forum on the
AP.  1560 posts.  Some are longer than others, some are better than others.
 But I finished the whole thing.  You'd think I'd be a pro by now.  But I'm
not.  Oh well.  I guess I'll just have to experiment some more.  ha ha ha.
Coffee rocks
bill
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14) From: Brian Kamnetz
Bill,
I'm slowly moving in your direction with the AP. Very slowly. I have
been reading about the AP for a long time, since it was introduced to
the SM page. I have been collecting some of the more descriptive posts
regarding different methods of brewing with the AP, and copying them
into Word documents and printing them out. Then Scott Marquart sent me
some synthetic felt filter material. Then I bought some files so that
I would be able to file the bayonette mounts. Then I bought an AP.
Next I need to find some time to experiment with it. I suppose a good
target date is my summer travels to the Midwest in July.
Brian
On 4/26/08, Bill  wrote:
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15) From: sci
Impressive! Ok, so don't tease us. What were the 10 most important AP tips
and tricks, do's and don'ts that you learned.
I jus wanna know, cuz I ain't gonna read no 1560 posts! :-)
BTW I've been doing lattes (yea...ok, so subtract a few CSA points, but at
least I don't add flavored syrups) with the AP and they are the best lattes
I've ever had. I do a double shot in the AP, and add about 6oz of steamed
milk. Ohh la la!
Ivan
Date: Sat, 26 Apr 2008 11:41:57 -0600
From: Bill 
Subject: Re: [Homeroast] AeroPress experiment for AP addicts
To: homeroast
Message-ID:
       <22428b320804261041i12cfd3ekd5a4ecc8f399afbe>
Content-Type: text/plain; charsetO-8859-1
Alright, I just have to brag.  I finished all 156 pages of CG's forum on the
AP.  1560 posts.  Some are longer than others, some are better than others.
 But I finished the whole thing.  You'd think I'd be a pro by now.  But I'm
not.  Oh well.  I guess I'll just have to experiment some more.  ha ha ha.
Coffee rocks
bill
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16) From: Bill
grind fine, use hotter water,
reduce the amount of grinds you use,
stirring is most important
invert the AP press bloom through filter
get poly felt filter
enjoy
enjoy
enjoy
On Sun, Apr 27, 2008 at 1:45 PM, sci  wrote:
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17) From: Brian Kamnetz
Thanks, Bill.
Brian
On 4/27/08, Bill  wrote:
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