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Topic: Roasting Decaf's (4 msgs / 91 lines)
1) From: George
Query for the informed.
I have roasted a bit of decaf coffee for my=
 wife.  She love Sweet Maria's decafs, got here a double 8 pack for Christm=
as.  So far she loves them all.
Being a brownish been to start and sof=
ter cracks it is rather difficult for me to judge the lighter roast levels.=
  It seems that I usually end up with probably a FC+ to Vienna roast..
=
What I would like to know from the decaf roasters is this.  Using Sweet =
Maria's Thermocouple do the same temps (air temp} for regular roasts levels=
 correspond to decafs?  If not, what percentage of my regular temps be incr=
eased or decreased?   I use a Zach and Dani's roaster, our smallest roaster=
, for her decafs as she doesn't
 drink that much coffee. 
 
=

2) From: Justin Marquez
On 1/21/07, George  wrote:
<Snip>
George -
I don't try to measure bean mass temps - just try to keep the air temp
in the BBQ grill the same whether it it be decaf or regular.
In my relatively limited experience....
With the same air temps, decafs seem to roast in about 80 to 90
percent of the time for a similarly-sized batch of regular coffee.
Decaf roasts also shows oil faster and at a lower roast level than
regular.
Safe Journeys and Sweet Music
Justin Marquez (CYPRESS, TX)

3) From: MichaelB
George,
I get essentially the same temperatures but the difficulty comes with the
time to the temperatures. i.e., the profile. My decaf roasts are more likely
to run right from 1st into 2nd, with little to no gap, so temperatures are
actually a help in figuring out what is happening without clear visual and
audible cues. Like you, some of my decafs end up as Vienna-. That's fine for
Decaf Donkey Blend which my wife prefers darker but is not always best for
Tom's other fine decafs that taste better at lesser roast levels.
One thing I've found that helps a bit with decaf control. Roast the decafs
later in the session. The hottop seems to get more stable the more I run it,
so there is a better chance for me to catch a City+ roast in a later batch.
Don't know what tricks you might use on your roaster.
On 1/21/07, George  wrote:
<Snip>
--
MichaelB

4) From: George
Thank you both for the suggestions.
I usually set the machine for regu=
lar coffees to 24 minutes (5 are cooling) for a FC+ to FC++ level for most =
beans and reduce a minute to 23 for the next roast.  This is after a 5 to 6=
 minute preheat and a 5 minute cool).  For the decafs I reduced it to 22 mi=
nutes for the first roast of decaf and it came out about FC where my wife l=
ikes it.  I left it at 22 for the second and had to shut terminate at 21, t=
he next set at 21 and roast came out the same level.  So it does seem that =
about a 11 to 12 percent reduction will give me approximately a FC+ to FC++=
 roast level on both regular and decafs.  Now I just have to keep and eye o=
ut and verify that and see if the same ratio holds up for lighter roasts.=
Thanks again,
 
George       the MadHemi Roaster of CNY
-=
---- Original Message ----
From: Justin Marquez 
T=
o: homeroast
Sent: Sunday, January 21, 2007 6:05:44=
 PM
Subject: Re: +Roasting Decaf's
On 1/21/07, George  wrote:
> Query for the informed.
>
> I have roasted a bit of=
 decaf coffee for my wife.  She love Sweet Maria's
> decafs, got here a d=
ouble 8 pack for Christmas.  So far she loves them all.
>
> Being a bro=
wnish been to start and softer cracks it is rather difficult for
> me to =
judge the lighter roast levels.  It
 seems that I usually end up with
>=
 probably a FC+ to Vienna roast..
>
> What I would like to know from th=
e decaf roasters is this.  Using Sweet
> Maria's Thermocouple do the same=
 temps (air temp} for regular roasts levels
> correspond to decafs?  If n=
ot, what percentage of my regular temps be
> increased or decreased?   I =
use a Zach and Dani's roaster, our smallest
> roaster, for her decafs as =
she doesn't drink that much coffee.
George -
I don't try to measu=
re bean mass temps - just try to keep the air temp
in the BBQ grill the s=
ame whether it it be decaf or regular.
In my relatively limited experi=
ence....
With the same air temps, decafs seem to roast in about 80 to =
90
percent of the time for a similarly-sized batch of regular coffee.
D=
ecaf roasts also shows oil faster and at a lower roast level than
regular=
.
Safe Journeys and Sweet Music
Justin Marquez
 (CYPRESS, TX)
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