Aromatic Milestones – The Basic Coffee Roasting Skill

Using aromatic milestones, you can roast without any logging software or theoretically even without a thermometer (although I don't advise it) as they mark certain progress in the coffee roasting process. You can identify them all the way until the first crack. As the name suggests, this approach uses your sense of smell to identify [...]

Aromatic Milestones – The Basic Coffee Roasting Skill2019-07-08T15:15:32-07:00

Roaster Setup at Kona Coffee Purveyors Hawaii

Raymond Suiter and Willem Boot discuss the new roaster setup at Kona Coffee Purveyors in Honolulu, Hawaii. Raymond pursues the manual/artisan way of coffee roasting, but he wants to be in full control, therefore they installed some really cool improvements on their Giesen coffee roaster. Check it out:  

Roaster Setup at Kona Coffee Purveyors Hawaii2019-07-08T15:15:32-07:00

Air Temperature Curve During Roasting

I have a 2kilo Roaster Authority Victory-2. Air flow is handled with a damper that allows all drum and 50/50 between drum and cooling bin. It also has a fan speed controller. I tend to roast at 100% fan speed but always running 50/50 airflow between drum and cooling bin. I feel as though I [...]

Air Temperature Curve During Roasting2019-07-08T15:15:32-07:00

Is Mysterious Airflow so Mysterious?

I know you get a lot of questions about mysterious airflow, but I still cannot completely understand how to find the prefect balance. The variable airflow control is the most recent modification I have made to the roaster so I haven't had much time to experiment with it, but so far I have been running [...]

Is Mysterious Airflow so Mysterious?2019-07-08T15:15:34-07:00

Tips for Upgrading a Coffee Roaster

Ben describes his modifications to his 20+ year 5kg old STA Impianti and asks Willem's opinion. We would love to hear abut your modifications and how they improved your coffee. please leave your comments bellow. His modifications: Changed the the the two large burners with only OFF/ON heat control, to a row of eight [...]

Tips for Upgrading a Coffee Roaster2019-07-08T15:15:34-07:00

Coffee Roaster Running Too Cold

I allow myself to ask you some questions about the roaster, I could see on your video that you had a Giesen and I'm working on a 15kg one for a week now and I think i have some heat or/and fan problem. When I drop a 13kg batch, my exhaust temp is dropping way [...]

Coffee Roaster Running Too Cold2019-07-08T15:15:34-07:00

Coffee Bean Density

Willem and his class closely inspect some Central American coffees. This inspection will provide the information that they will need to plan the beginning of the roast. Willem explains the differences in density between a bean with a deep center cut and one with a closed center cut. The texture of the surface, the overall [...]

Coffee Bean Density2019-07-08T15:15:34-07:00

Analysing the Density of the Green Coffee Bean

Willem and his students discuss some of the key parameters in roasting, these being the coffee bean as an ingredient, the mass of the batch, and the density of the coffee. They also discuss the differences between coffees grown in different latitudes, yet at the same elevation. Different locations provide very different weather, which in [...]

Analysing the Density of the Green Coffee Bean2019-07-08T15:15:34-07:00