Roasted a Kenya AA last night. I've had this particular coffee several different years starting in '09, and it always impresses! This one is from 2014. It is from the Tambaya cooperative in the Nyeri region. Primarily an SL-28 varietal (some SL-34), 18 screen size (fairly large bean). The Sweet Maria's review of the 2009 lot can be found about halfway down the page
here.
I roasted this batch to Full City, and it took right at 10 minutes from start to finish. Here are some pictures.
The West Bend Poppery setup. You can see the fan boost transformer, and the switch box I wired the fan speed control into. The bottom plug is variable voltage, the top one is FULL boost. Note the stuff flying out of the top of my popper. More on that later.
Right as I turned the popper on. Beans are heaviest at this point, and don't move around quite as much (making it easier to focus the camera).
3 minutes into the roast. The beans are losing a lot of their moisture at this point, and have started moving around. Temperature is around 250º F here, and it smells like wet hay.
5 minutes into the roast, and you can see the beans have started changing color. Smells yeasty, almost like baking bread. Temperature is around 325º F here.
6 minutes in, around 350º F here. Getting darker.
7 minutes in, about 365º F.
7 minutes, 30 seconds. Beans are rapidly getting darker. 375º F.
8 minutes, 30 seconds. First crack beginning. Temperature is about 395º F.
10 minutes. Roast is done! Stopped at 435º F.
Here's a quick shot of the "chaff" that's all over the place now. This is the hard part about trying to roast coffee indoors. Messy! It is a thin skin (called silverskin) that was around the green beans. As they swell with the expanding water vapor, they break free of this stuff and it blows out of the roaster. Some coffees only have a little bit, others have LOTS!
Finally, here are the resulting beans! Smells SO good!!!
Hope you enjoyed this little write-up!
Happy ICO International Coffee Day!!!