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In contrast, dark roasts register lower on the Agtron scale, around 25-40. This score signifies beans that have been roasted longer, developing deeper, more intense flavors. The longer roasting process also reduces ac...
Agtron’s scale ranges between 25 and 95, with the darker coffees corresponding to the lower numbers. You can either measure whole bean or ground coffee, and we opt for ground.
In this paper, the authors conducted sensory evaluations of coffee samples brewed with varying degrees of extraction. They found that under-extracted coffee tended to be sour or sharp in taste, while over-extracted co...
The Specialty Coffee Association (SCA) identifies eight primary types of coffee roasts on the Agtron Gourmet Coffee scale, ranging from very light to very dark. These levels, measured by Agtron numbers from 25 (very d...
The Agtron Scale is a type of spectrophotometer that measures the reflectance of light off roasted coffee beans. Higher numbers indicate lighter roasts, and lower numbers indicate darker roasts.
This scale was developed using an Agtron light reflectance spectrophotometer to provide a numerical color reading for coffee ranging from 100 to 0. The lower the number the darker the roast.
Coffee roast levels can be described on a scale of light, medium, and dark. The roast level is determined by the bean type, the amount of heat the beans are exposed to, and the length of time they’re in the roaster.
The "roast level" indicators on the scale we are using are our internal references we have paired with a roast level and where we consider those roast levels to fall on the Agtron scale: The lower the number, the dark...
By precisely quantifying roast levels through Agtron values, roasters can not only ensure batch-to-batch consistency but also develop correlations between color and flavor, thus enhancing both the scientific rigor and...
Agtron readings are based on the color of either whole roasted beans or ground coffee. Roasters often measure both to better understand how evenly a batch was roasted. As green beans go through the roasting process — ...
