Great content! I'm a home roaster thinking of giving a go professionally. This information makes so much more logical sense to my scientific brain than all the other mumbo jumbo from internet "experts". A short development time not giving time for the heat to fully penetrate the bean giving a more acidic and complex flavor makes so much sense. Just like cooking a steak!
I love this seminar because it calms my obsessive side. This is good news! Great coffee is still a lot of work, but we can put in that work where it makes a bigger difference.
Yes, we need to be specific with the goal we have in order to make decisions without wasting too much effort on areas that does not matter so that we can spend the limited time and ressources we have on the things that mattes in the context we have choosen to provide value. Happy it helps 🙂
Thanks for the post. I learned quite a lot. I have a question about starting up a roaster and the first batch. Is it important to let the roaster stay at charge temperature for a while so that all the metal parts achieve a sort of steady state or is it ok to put in the first batch as soon as the probes show that charge temperature has been reached? If it needs to stay at charge temperature for a whlie, then how do we decide that the ideal conditions for the first batch has been reached?
This is a bit different from roaster to roast. Most roasters I have been working with takes around 30 min to preheat and depending on the roaster the procedure can vary a bit. But generally you need to keep the roaster close to the starting temperature for around 30 min. You know that you have done the right thing when the first roast behaves like the subsequent roasts of the day
36:20 no... colour "intensity" would be the SATURATION of the colour... what I think you are getting at is, as you say, it's about a grey scale... A grey scale is only about luminocity... how bright or dark it is. So you are measuring degree of darkness, not intensity of colour.
I have learned from people with phototechnical background that the term 'photointensity' means the total amount of 'light' acorss wavelenghts so that's why I'm using it as the monocromatic concept so that it is independent of 'color' (wavelenght). Recently a study came out of UC Davis discussing this in detail and when I have read that paper I'll make a separate podcast episode that will be also launched here on RU-vid about the topic.
