[Homeroast] Reflections on Roasting Fundamentals

John Monteleone johnmonteleone at gmail.com
Sat Jun 28 17:26:15 CDT 2014

My roasts are not too light.  Perhaps my thermcouple is not reading
properly.  But first crack clearly (audibly) happens at 192 on my digital
thermocouple.  It's a clear, distinct, and consistent first crack.  If you
get first crack at 401f, what temperature is it when you cool typically.


On Sat, Jun 28, 2014 at 2:02 PM, miKe mcKoffee <mckona at comcast.net> wrote:

> Sorry but those temps don't quite sense for bean mass. 205c drop = 401f
> which is just beginning of first. Are your beans rather light brown and
> surface crinkly with prominent chaff line in crease on drop?
> Slave to the Bean miKe mcKoffee
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> -----Original Message-----
> From: Homeroast [mailto:homeroast-bounces at lists.sweetmariascoffee.com] On
> Behalf Of John Monteleone
> Sent: Saturday, June 28, 2014 12:48 PM
> To: A list to discuss home coffee roasting. There are rules for this
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> Subject: Re: [Homeroast] Reflections on Roasting Fundamentals
> This is a great dialouge.  I've been trying to figure out.  I have been
> using the Quest for about 4 months and I'm starting to get a better
> understanding of a roast curve.  Using a thermacouple I track the
> temperature every minute.  I have not been able to extend the time between
> the first and second so I liked the recommendation to back off the power
> prior to first crack.  My first crack has been pretty predictable.  I
> wonder
> if someone could comment on my roast curve and temps.  My beans have been
> Kenyans and Guatemalans.  Leading up to first crack, the temperature
> inside is rising 8 or 9 degrees celsius per minute.    My first crack has
> been hitting around 9 minutes at 190 to 192 degrees celsius.  That is when
> I
> turn down the heart and turn up the fan.  (i will change that now)  I have
> been ending the roast around 2 minutes later before second crack at a
> temperature of around 205.  This is right before second crack.  My question
> is:  what does the temperature ramp look like leading into first crack and
> prior to second crack if you are trying to extend the time to almost 3
> minutes.  Do I need to get to 200 at the very least.  How much higher.
>  What would a stall look like.  Would it stop at 192 and not really
> increase.  Any comments would be appreciated.
> John
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