Recently it came to my attention that a coffee roaster had posted on their blog that people should be suspicious of a coffee roaster that does not or will not disclose the temperature at which a coffee has been roasted.
Though it is true that for each different type of roast, City Roast, Full City Roast, French Roast, etc…there is an industry standard, target temperature that is considered the norm for each particular roast, I find this a very interesting statement for a couple of reasons.
First, this statement is somewhat misleading; I will explain why. If you own or have ever owned more than one car in your lifetime, think for a minute and ask yourself two questions. Did both cars drive or perform the same way? Were the cars manufactured the same way? I would expect that you probably answered “No” to both of those questions.
Why do I draw this comparison? Well, just like no two cars are exactly the same, nor are any two coffee roasters exactly the same. Just as there is more than one car maker and more than one model of car, so is it the same with coffee roasters. There are at least a half-dozen commercial roaster manufacturers. Though the principles behind roasting coffee are the same – bean selection, time, temperature, air flow – each roaster manufacturer has their own design(s). Frequently, just like the car manufacturers, each roaster manufacturer may use components from different suppliers. The combination of these two facts means that though the end result is the same, fresh-roasted coffee, each roaster may not perform exactly the same way, or more correctly the data relating to the roasting process may differ due to the differences in the components that make up a particular roaster.
How do I know? Last year, in the spring of 2009, when I upgraded from the Diedrich Roaster I was using to my current roaster, a larger and much more sophisticated roaster custom manufactured for me by a specialty roaster manufacturer, for almost a two-week period I had difficulty matching the same roast levels or profiles I had been achieving on the Diedrich. Working closely with the manufacturer of my new roaster, we were able to identify these two important facts: different thermocouples, the technical name for what is essentially a thermometer installed inside a coffee roaster, made by different manufacturers may be calibrated or record temperatures differently. Second, depending on where the thermocouple or thermocouples (my roaster has three) are placed inside the coffee roaster will also yield different readings. If a thermocouple is installed closer to the heat source in one roaster when compared with a different roaster, logically it will yield higher readings; and conversely, if installed further away from the heat source it will yield lower readings.
This was my experience, which after a period of close monitoring and assessment, I was able to adjust and compensate for this differential. The result, the wonderful, smooth, full-flavored coffee masterpieces that I have been roasting and make available to you through our website, at the Harrisonburg Farmers Market, and a number of other venue in and around the Shenandoah Valley and beyond as listed on our website.
The preceding was the technical explanation. There is second reason, that being proprietary knowledge. Ask yourself this question, if you owned a restaurant that was known for a particular signature dish and you had competition from other restaurants in the community, would you share any part of the recipe for this dish with anyone and everyone, or with one of your competitors? I would expect most people to say, “No”. Such is our position. As a roaster, I have worked long and hard to create each roast profile for our various coffees, and to freely give such information out would be akin to “giving away the farm”.
The reality is that except, maybe, to another coffee roaster the temperature to which the beans are roasted and leave the roaster is inconsquential especially when considering the technical differences between the brands or types of roasters. The real and true test is what you experience and feel upon opening the bag and brewing a cup - the appearance of the beans, if the bean color and appearence is an important part of the whole experience for you, the wonderful aroma, and the taste as you enjoy a cup. That…is what is truly most important!
So, to address the comment or statement made by this other roaster, I would not regard such guarded information or “secrecy” as being suspect or dishonest as this one roaster is implying, I would say that it really makes sense…Grains of Sense®

