HomeRoast Digest


Topic: Timing on the 1st and 2nd cracks (3 msgs / 97 lines)
1) From: David
Another newbie question :)
When does the 1st and 2nd crack occur?
For us, it seems that there is a series of 2nd cracks lasting about a minute
or so.  Is this normal?
Is it different with different types of beans?
Thanks!!!
Dave

2) From: Oaklandguy
Hi, Dave. Welcome to a great group and the world of homeroasting.
1st crack and 2nd crack are distinct events - even though they can =
happen
very close together.  1st crack is loud (like popcorn) and 2nd crack is =
not
as loud (more link the crackling of cereal in milk or wax paper being =
wadded
up).  1st can happen in the first fe minutes of roasting, and 2nd can =
happen
up to 12-15 minutes later.
You're right about the beans making a difference.  Other factors that =
affect
when the cracks occur are what type of roaster you're using, the number =
of
beans, if you're trying to delay either 1st or 2nd crack, and the =
ambient
temperature where your roasting.
I'm a newbie, too, so more experienced folks will have more experienced
advice.  Have fun.
Brent

3) From: Edward Spiegel
At 6:55 AM -0400 8/13/04, David wrote:
<Snip>
The timing depends on a lot of factors: your roaster the ambient temp, the variety of beans, ambient humidity.
On a really hot popper with too many beans you might have first crack in 1 1/2 minutes with second crack at 2 1/2 minutes. Or you might have first crack at 10 minutes and second at 15. There is a huge amount of variation.
If you haven't seen the web page of popper tips that I have created, you might find it helpful. It both discusses detecting the cracks and how to adjust when they happen. The page is at:http://www.edwardspiegel.org/coffeeBest,
Edward


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