Ive done a few roasts with this setup now and have quite a few pages of notes to look back on. When I did this I noticed a really interesting pattern. The first snaps of 2nd crack invariably happen 15-16 deg C above the temp observed for the very first snaps of 1st crack. This is across quite a few very different beans that exhibit a range of temps at which the first snaps of 1st crack occurs (about a 10 deg C range). This is brilliant, as it allows a virtually fly-by-wire approach to roasting. I did a twilight roast the other day and gauged it solely by this temperature offset and sure enough got it just before the start of 2nd crack (ie 1st crack + 14 deg). Ive also racked a few more up with great results, including multi-bean blends. This allows very fine control of the roast degree independent of the lighting conditions. So now my roasts vary in the range of 12-18 deg C from 1st crack, depending on where I want to take it.
I should note that this offset will probably vary across different corretto setups dependent on where the thermocouple is situated.
The corretto goes from strength to strength.
Cheers,
Mark.
I should note that this offset will probably vary across different corretto setups dependent on where the thermocouple is situated.
The corretto goes from strength to strength.
Cheers,
Mark.



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