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trouble with chemex bleached vs unbleached
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joey
Senior Member


Joined: 24 Dec 2002
Posts: 341
Location: madison, wi
Expertise: I love coffee

Espresso: Oscar
Grinder: Mazzer Mini
Drip: Chemex
Roaster: Behmor
Posted Fri Mar 7, 2014, 11:09pm
Subject: trouble with chemex bleached vs unbleached
 

i've been using unbleached filters with my own roasted coffee for quite some time.  i was making good tasting coffee ending up with a little over a 4 min brew. last week i bought a box of bleached filters since i've seen many people say the unbleached taste "papery".  i wanted to see if theres a difference myself.  
for some reason, the last three batches have pretty much stalled halfway through.  i'm using the same method and grind that i've always used.  the only difference is the filter.  i usually ground at a 4.5 on my mazzer and on the most recent one i did it at 6.  i may have gotten a little more out of it, but i'm still not even halfway there.
all three times i used the same coffee--could that be the issue?  i dont have any other coffee to try right now-got behind on roasting.
has anyone else switched between unbleached and bleached and had issues like this?
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MWJB
Senior Member


Joined: 1 Jun 2013
Posts: 178
Location: UK
Expertise: I like coffee

Grinder: Rocky, Lido, Porlex, Hario...
Drip: Not enough room to list...
Posted Sat Mar 8, 2014, 4:39am
Subject: Re: trouble with chemex bleached vs unbleached
 

The weave on the bleached papers may be a little more open, thus clogging with a finer grind, sounds like you need to go coarser.
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CoffeeNark
Senior Member


Joined: 30 Dec 2013
Posts: 34
Location: Nashville, TN
Expertise: I love coffee

Posted Sat Mar 8, 2014, 9:01am
Subject: Re: trouble with chemex bleached vs unbleached
 

I used the unbleached when I first got my Chemex and just recently switched to the bleached.  I have definitely had to go coarser in my grind.
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jaybar
Senior Member


Joined: 13 Sep 2011
Posts: 165
Location: Brooklyn
Expertise: Just starting

Posted Sat Mar 8, 2014, 2:15pm
Subject: Re: trouble with chemex bleached vs unbleached
 

Hi

I spoke with Chemex yesterday. They were aware of issues with the white folded square filters in the new packaging. Unfortunately, whether you end up having a problem depends on when the filters were supplied by chemex to the merchant you purchased them from. The problem seems to be rectified, but whether one ends up with a bad box depends on the supply chain.

According to Chemex, they are not aware of the natural filters having the issue or the folded circles. YMMV.

Jay
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jaybar
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Joined: 13 Sep 2011
Posts: 165
Location: Brooklyn
Expertise: Just starting

Posted Sat Mar 8, 2014, 2:18pm
Subject: Re: trouble with chemex bleached vs unbleached
 

I did not find that grinding coarser had an appreciable effect.

Jay
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SleepySteve
Senior Member


Joined: 9 Mar 2014
Posts: 1
Location: NY
Expertise: I love coffee

Espresso: Nespresso
Grinder: Virtuoso
Drip: Various Chemexes, V60es
Posted Sun Mar 9, 2014, 2:17am
Subject: Re: trouble with chemex bleached vs unbleached
 

This happened to me about 6-8 months ago and thought I was going crazy. Original box ordered from Amazon, thought it was a bad batch, ordered another box a week later. Same! Stalled midway.

Even without coffee, the bleached squares would sometimes back up just straight boiled water to a ridiculously slow drip.
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joey
Senior Member


Joined: 24 Dec 2002
Posts: 341
Location: madison, wi
Expertise: I love coffee

Espresso: Oscar
Grinder: Mazzer Mini
Drip: Chemex
Roaster: Behmor
Posted Sun Mar 9, 2014, 12:02pm
Subject: Re: trouble with chemex bleached vs unbleached
 

jaybar Said:

Hi

I spoke with Chemex yesterday. They were aware of issues with the white folded square filters in the new packaging. Unfortunately, whether you end up having a problem depends on when the filters were supplied by chemex to the merchant you purchased them from. The problem seems to be rectified, but whether one ends up with a bad box depends on the supply chain.

According to Chemex, they are not aware of the natural filters having the issue or the folded circles. YMMV.

Jay

Posted March 8, 2014 link

so is chemex doing anything about this?  next batch i'll try coarser but i dont know if i can go coarse enough to hit close to four minutes.
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jaybar
Senior Member


Joined: 13 Sep 2011
Posts: 165
Location: Brooklyn
Expertise: Just starting

Posted Sun Mar 9, 2014, 1:59pm
Subject: Re: trouble with chemex bleached vs unbleached
 

I did not find coarser to help. I found the natural to work and will try the circles. I get the sense from Chemex that the latest production has corrected the problem. The issue is already what is in distribution.

Jay
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kennyrsmith
Senior Member


Joined: 27 Jan 2014
Posts: 11
Location: Kentucky, USA
Expertise: Professional

Espresso: Dalla Corte Mini
Grinder: Mahlkonig Pro M/Baratza...
Posted Thu Mar 13, 2014, 5:21pm
Subject: Re: trouble with chemex bleached vs unbleached
 

Hmm, that's really interesting. I have always had much more papery taste out of the unbleached filters. Do you generally rinse your filters before brewing? It may help if you run around 100ml of water through the filter before brewing.
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jaybar
Senior Member


Joined: 13 Sep 2011
Posts: 165
Location: Brooklyn
Expertise: Just starting

Posted Thu Mar 13, 2014, 6:02pm
Subject: Re: trouble with chemex bleached vs unbleached
 

I generally rinse with 6-10 ounces of just boiled water.
That is about 280-300ml of water.


Jay
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