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Ah, 20 minutes is a great roast time
You should find a big difference in taste quality after stepping up from the popper.
You do get the odd crater in the beans. Some beans are prone to it.
Ive brought commercial roasts before and they have had plenty of bean bits floating around the pack.
Hi Corrtto, thanks for that. I should have spent another minute on the x-axis of the graph. Its actually in seconds, so all up there was a little over 20mins roast time. Should I be concerned about the exploding bean (well, popped crater anyway)?
In the popper Id always get those little bits o bean spinning around after second crack, so I guess its a normal part of the roast (just dont remember coming across too many of those in the commercial roasts I get).
Thanks again for coming up with such a brilliant little roaster idea.
Looking good there Gavnic. The roast looks very even (from the small sample shown).
I like the picture too with the graph overlaid. However a 12 minute roast in the BM is a bit quick. You should be aiming for 1st crack around 10 minutes and 2nd crack around 18 minutes. But practice, practice practice :-)
Yes, the odd divot does appear depending on the bean. Some are divot free and others have the odd divot.
Today was my first attempt at a corretto roast (thanks dailybean). I had my heatgun pointed to the far corner of the BM pan and the thermo probe in the bean mass at the opposite corner.
As you can see from the attached pic I got a little carried away after first crack in trying to slow the roast (too much control for my own good). From first crack to second I kept trying to find a balance where the temp would slow, but instead I think Ive stalled it a couple of times. Waited for second crack to start snapping and then dumped beans into seive. Roast didnt look too bad, not sure how even the peaberry should look. You might also notice one of the beans has a sizable divot taken out of it (presumably during second crack). Is this normal?
Id guess the beans are roasted to around CS-9? (Coffee Snobs 9)
All in all the correttos looking promising. This 1 roast would have taken me 3 popper roasts to produce (and about 3 times as long with the cool-down between).
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