Hey folks - this was my first roast ever! I’ve attached my curve and my recipe for reference. Not knowing anything about how this bean wants to be roasted, I went into the roast with the a pretty generic set of goals. I’ll share my goals and results here:
Target Weight Loss: 12% | Actual Weight Loss: 13.5%
Target DT: 1:30 | Actual DT: 1:22
Target DT %: 20% | Actual DT %: 14%
Target Roast Time: 9:00 | Actual Roast Time: 9:32
Target End Temp: 400 | Actual End Temp: 405
Color: Don’t own a color meter yet!
Around minute 7 , you can see a pretty significant flick on the B-ROR, but it doesn’t seem to flick on the I-ROR (although there is some considerable variability).
Would you drop the power a little earlier on to avoid that flick? Or should I ignore it because it doesn’t show up in the I-ROR?
2. Roast was too dark
The main problem with this roast is that it is too dark. Actual weight loss is proof of that. The reason I didn’t drop earlier was that I was trying to hit my goal of 1:30 DT with a DT% of 20%, and I didn’t even come close to hitting that goal. I held on for as long as I could, but still ended up too dark with a 14% DT% and a DT of 1:20.
3. Time vs Temp for recipes
Random question - do you favor time-based recipes over temp-based? From what I read, temp-based recipes are better because they are not affected by ambient temperatures, but Roos’ sample roasting recipe is time-based. Would you recommend I switch to a time-based recipe?
Drop from P6 to P5 at 360 instead of 370, in order to better anticipate the flick.
Increase P at drop to 8 instead of 7. The goal here would be to accelerate the drying stage of the roast, which would result an overall shorter roast, which would boost the DT%.
11 - 13 % Weight Loss: This is, almost without exception, light roast territory. Generally, unless the coffee is quite wet, as you move above 13% you end up with what I would consider a light-medium or medium roast.
Interesting. I don’t know where it’s come from to drop a roast before or during first crack. That’s WAY too light IMO, terrible tasting. 385-390 cannot possibly be through first crack unless the instrumentation is significantly off.
I have never had first crack end by 405. Maybe by 410, usually more like 420.