I'm impatient. I'm not scientific. These are two facts that I have deduced from today's experiment. I know I stated that I would continue to use the same beans so that I only change one variable from roast to roast, but I've been drinking the guatamela beans for several days now and decided I would mix it up a little. I had a half pound bag of Cameroon Caplami Java beans from Sweet Maria's and thought I would roast up the whole bag in two seperate roasts. This lead me two smaller batches then the normal 150g that I normally roast; I guess enjoying the process is more important than being scientific...and I have heard that the worst cup of home roast beats the best store bought coffee.
Weight
Batch 1: 110g/90g 18.18% weight loss
Batch 2: 112g/90g 21.4% weight loss
Roasting Profile
350 degrees 2:30 minutes
400 degrees 1:30 minutes
475 degrees 5:00 minutes
Roasting Notes
The first batch I stopped the batch at 5:12. The beans did not show any signs of external oil, but were probably close. Once the cool down stopped, the beans looked like they could have used a little more time. Because of my lack of patience, I started the second batch about 10 minutes after the first batch ended. The internal chamber temp was already at about 110 degrees, instead of the 80-90 degrees that it normally would be if I waited 20+ minutes. Waiting is probably important to consistency in the future. Because of the higher starting temp, I stopped the second batch at 5:18. The beans were showing signs of oil.
Tasting Notes
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