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Topic: First Crack Timing (6 msgs / 126 lines)
1) From: Coffee
I was reading SM Roastmaster's Blog about the roasting of Guatemala  
Antigua Finca Retana Yellow Bourbon. It states, "First crack came on  
at 401 and lasted a good ten seconds." In my Gene Cafe, First crack  
typically goes on for about two minutes. What would account for this  
difference?
-Peter
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2) From: raymanowen
A short duration of any segment of a roast except cooling, probably
indicates that greater energy was being applied (faster ramp up or higher
steady applied temperature.)
Bottom Line is- How does your roast taste to you?
Cheers, Mabuhay -RayO, aka Opa!
On Thu, Apr 3, 2008 at 12:00 PM, Coffee  wrote:
<Snip>
-- 
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
Wichita (ex- NYC Paramount) WurliTzer- 1976
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3) From: Peter Walsh
The roasting guide says that first crack starts at about 401F and  
finishes about 426F. That seems like too much of a jump for 10  
seconds? So that made me wonder if it were more than just the heat. I  
imagine it would be different for different beans, but this is so  
dramatically different. Is it just the heat? Is it the beans? is it  
the batch size? I just couldn't reconcile any of these factors with an  
order of magnitude change in time.
What kind of first crack durations do other people get?
-Peter
On Apr 3, 2008, at 10:48 PM, raymanowen wrote:
<Snip>
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4) From: Coffee
The roasting guide says that first crack starts at about 401F and  
finishes about 426F. That seems like too much of a jump for 10  
seconds? So that made me wonder if it were more than just the heat. I  
imagine it would be different for different beans, but this is so  
dramatically different. Is it just the heat? Is it the beans? is it  
the batch size? I just couldn't reconcile any of these factors with an  
order of magnitude change in time.
What kind of first crack durations do other people get?
-Peter
On Apr 3, 2008, at 10:48 PM, raymanowen wrote:
<Snip>
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5) From: David Rossell
1.5 minutes to 2 minutes.
David Rossell
Administrator of Network Services and Planning
Norwood School
8821 River Rd.
Bethesda, MD 20817
(301) 841-2178
drossell

6) From: Gary Foster
1st crack seems to last about a minute and a half for me in my Behmor.
-- Gary F.
Coffee wrote:
<Snip>
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