HomeRoast Digest


Topic: A little bean technology question.. (2 msgs / 36 lines)
1) From: Texinga
With regard to smoke during the roast, what is it about certain beans that 
really sets them apart?  I was roasting the Sulawesi Toraja Rantapao (from 
SM's) this evening on the back porch.  This bean is tan in color, requires 
more beans (volume wise) to make 8oz and smokes like there is no tomorrow 
after it hits first crack.  I even had my neighbor come over once when I was 
roasting this bean to make sure there wasn't a fire.  If you roast this bean 
into 2nd crack, now you're really into the smoke zone.  On my Alp it takes 
about 3 minutes after I stop roasting for the smoke to die down (something 
I've not seen on any other bean I've roasted thus far).
So, what is it that makes this bean so distinctive in this regard?  Is it 
moisture content, somebody hit that variety with a "smoke stick" or what?  
I'd really like to understand this component better just out of curiosity.  
I've roasted a dozen other beans and none of them even come close (smoke 
wise) to what this bean pumps out.  By the way, this is one heavenly bean, 
roasted to 2nd crack and after it has rested 3-4 days.  Your thoughts?

2) From: Tom & Maria
<Snip>
The monsooned coffees are dofferent in so many ways that I am sure the
extra smoke sypltom lies within. But I cant pinpoint it. A guess would be
lack of chaff in many of these. The chaff has been removed in the
processing of the coffee after the exposure to moist monsoon air. The
coffee might also react to heat at lower temperatures in soime regards, so
some material burns at a lower temp. I have alsways roasted it on the
Diedrich the same temp and roast curve as other non-monsooned coffees. But
I watch it very carefully and usually find it doesnt conduct heat as well
(possibley the swollen size and lower density is resonsible for this) so it
tends to need more time in the roaster....
Ton
                  "Great coffee comes from tiny roasters"
           Sweet Maria's Home Coffee Roasting  -  Tom & Maria
                     http://www.sweetmarias.com


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