Coffee roasting is the core step that determines the direction of flavor. The SCA (Specialty Coffee Association) color card divides roast levels into eight grades, each with corresponding color values and sensory characteristics from extremely light to extremely dark. This article focuses on this standard color card, explaining one by one the bean surface color, weight loss ratio, flavor tendency, and suitable applications of each roast level, while also organizing the causes and identification methods of common green bean defects. The article also includes Front Street Coffee's reference guidelines to help roasting enthusiasts match color card readings with actual practice, choose the right roasting curve, and make the cup they want. [more…]

What degree of coffee roasting is considered appropriate? Starting from the key milestone of first crack, this article systematically sorts out the logic for determining coffee bean roast level, and with the help of Agtron color values, divides roast degree into eight levels: light, cinnamon, medium, deep, city, full city, French, and Italian, explaining one by one the timing for dropping each level and its flavor direction. At the same time, it answers the correspondence between the Roasting percentage markings commonly used by roasters and Agtron color values, helping coffee enthusiasts quickly understand the roasting information on packaging. The article also includes Front Street Coffee's specialty bean recommendation channel for further communication and purchasing. [more…]

Coffee beans transform from green raw beans into brown roasted beans entirely through the key process of roasting. The length of roasting time directly determines the depth of the bean surface color and also shapes completely different flavor directions. The roasting color standard card established by the Specialty Coffee Association of America (SCAA) divides roast levels into eight grades, from light roast to Italian roast, with each level corresponding to a specific drop time and flavor characteristics. In addition, emerging concepts such as Nordic ultra-light roast and Japanese ultra-dark roast have gradually entered the view of enthusiasts. This article will systematically sort out these eight levels, the five stages of roasting, and the classification methods used by Front Street Coffee in practical applications, helping readers build a complete understanding of coffee roast levels. [more…]

The flavor expression of coffee beans is closely related to the degree of roasting; the same bean will present completely different aromas and mouthfeels under different roasting curves. For coffee enthusiasts, mastering methods to judge the roast level not only helps in selecting beans that suit one's taste, but also enables a more accurate understanding of the flavor descriptions on the packaging. Based on the experience of Front Street Coffee, this article introduces three practical ways to identify roast level: first, by visually observing the bean surface color, wrinkles, and oil conditions; second, by inferring the roasting range from flavor descriptions; and third, by referring to the SCAA's Agtron color value standard, matching the eight-level roast classification with the commonly understood light, medium, and dark roasts, providing a reference for daily bean selection and brewing. [more…]

The roast level of coffee beans directly influences the final flavor profile, yet standards vary from country to country, often leaving beginners confused. From the perspective of Front Street, this article systematically introduces the eight-level roasting standard developed by the SCAA in conjunction with Agtron, including the color values and drop times for Light, Cinnamon, Medium, Deep, City, Full City, French, and Italian roasts, and explains how to determine the roast level through flavor descriptions. At the same time, for coffee beans roasted at light-to-medium and medium-dark levels, Front Street shares specific grinding and water temperature recommendations to help everyone brew their ideal flavor more effectively. [more…]

Want to roast coffee beans at home but don't know where to start? Front Street Coffee, drawing on the practical experience of baristas, introduces the key operating points of drum roasting and compiles SCAA's eight-level roast degree comparison chart—from light roast with an Agtron color value of 95 to Italian roast with a color value of 25, explaining one by one the timing of each stage's release from the roaster, appearance changes, and flavor performance. The article also compares the time differences between a professional roaster and drum roasting for the same Brazilian Cerrado Red Bourbon coffee beans, helping coffee enthusiasts understand how roast degree determines the acidity-bitterness direction of a cup of coffee. [more…]

Consumers often wonder why Front Street Coffee beans are not labeled with a roast level, and behind this lies a professional roasting classification system. From Front Street's perspective, this article first introduces the industry's eight-level roast classification based on Agtron color values, explaining one by one the drop timing and flavor characteristics from light roast to Italian roast; it then explains why presenting this standard directly to consumers would create a burden of understanding, and shares Front Street's approach of simplifying the complex—grouping coffees into medium-light roast and medium-dark roast according to the degree of acidity, sweetness, and bitterness, while also giving corresponding brewing parameter suggestions to help coffee lovers more easily choose beans that suit their own taste. [more…]

Coffee roasting is the key process through which green beans transform into brown roasted beans. The length of heat exposure directly determines the color of the bean surface and thus defines different roast levels. The SCAA, the world's largest coffee trade association, established an eight-level roast standard based on Agtron color values, from the bright acidity of light roasts to the intense, smoky bitterness of Italian roasts, with each stage having its own distinctive flavor trajectory and drop time. Beyond this official system, new concepts such as ultra-light Nordic roasting and ultra-dark Japanese roasting have gradually entered enthusiasts' field of view. In everyday communication, Front Street Coffee uses another, more intuitive classification that simplifies roasted beans into light, medium-light, medium, medium-dark, and dark roasts, making it easier for consumers to understand and choose. This article will systematically organize these grading standards and provide an in-depth analysis of the five stages of roasting and key practical points. [more…]

What standards are actually used to classify the light, medium, and dark roasts commonly seen on coffee bean packaging, along with names like Cinnamon, City, and French? This article starts with the eight-level roast color card developed by the SCAA (Specialty Coffee Association of America) and the Agtron company, explaining how Agtron color values correspond to drop time, and groups the eight levels into four major categories: light, medium, medium-dark, and dark, explaining the flavor characteristics of each stage. The article also uses Front Street Coffee's Yirgacheffe Gidding and PWN Golden Mandheling as examples, fully presenting the roasting curve from charge temperature, adjustments to heat and airflow, to first crack development and drop timing, as well as the brewing parameters and flavor descriptions for the V60 and KONO Meimon drippers, making it easy for enthusiasts to build a corresponding understanding of roasting and extraction. [more…]

The roast level of coffee beans often directly determines the flavor expression in the final cup. When confronted with terms on packaging such as light roast, medium roast, dark roast, and even cinnamon roast, city roast, and French roast, many friends new to specialty coffee are often confused. From the perspective of Front Street Coffee, this article first sorts out the eight-tier roast standards established by the SCAA based on Agtron color values, then groups them into two major categories—light and medium—explaining their respective flavor tendencies. It then uses the light-roasted Yirgacheffe Gedeb Cooperative and washed beans, along with the medium-dark roasted Front Street PWN Golden Mandheling as examples, fully disclosing the roast curves and brewing parameters for the V60 and KONO Meimon drippers, helping readers build a systematic understanding from roasting to extraction. [more…]

People generally assume that espresso must be made with dark-roasted beans, but nowadays quite a few cafés have already lowered the roast level to City roast or even lighter. This time, Front Street Coffee used three light-roasted Ethiopian beans—Huakui, Gudingding, and Dorothy—to pull espresso separately and make Americanos and lattes, wanting to see how light-roasted beans actually perform in espresso. The experiment found that light-roasted beans tend to preserve bright fruit acidity and floral aromas when made into an Americano, but the flavors are easily overpowered by milk when made into a latte. If you also want to try using light-roasted beans for espresso, first adjust the grind finer, control the pressure and pre-infusion time, and you may be rewarded with an unexpectedly juicy espresso. [more…]

Judging the roast level of coffee beans by the naked eye alone, based on how light or dark the color appears, is clearly not rigorous enough. In the industry, a colorimeter is more commonly used to measure the degree of caramelization. This article will start with the measurement principle, explain the meaning of the Agtron value (color value), the difference between whole-bean color and ground-coffee color value, and how the RD value calculated from the difference between the two reflects roast uniformity. It will also explain how factors such as processing method affect the measurement results. Front Street Coffee will also present the commonly shared Agtron value roasting chart to help coffee enthusiasts more systematically understand the scientific basis behind roast assessment. [more…]

The color differences that coffee beans display after roasting are not arbitrary; the industry long ago established a scientific quantitative standard—the Agtron color value, also known as the caramelization analysis number. This set of values runs from 95 to 25, corresponding to eight levels from light roast to Italian roast: the higher the number, the lighter the color, and the lower the number, the darker it is. Each color value range has a clear drop time node and flavor characteristics: from light roasts dominated by bright acidity, it gradually transitions to dark roasts dominated by bitterness and smoky notes. Understanding these color values not only helps us recognize the correspondence between roast level and taste, but also helps us understand why very dark roasts are now hard to find under the specialty coffee trend. But color value is only a reference tool; in actual judgment, tasting perception is still needed, since factors such as processing method also affect the appearance of the beans. [more…]

In coffee roasting, how can we ensure that every batch of beans achieves consistent quality? In addition to relying on cupping to evaluate flavor, we also use the RoAmi roast degree analyzer to record the Agtron caramelization value of the coffee beans, and retain historical data for reference. The RoAmi is essentially a colorimeter, with SCAA's Agtron algorithm embedded inside, capable of calculating the roast value by reading the color data of the bean surface or ground surface. This article will introduce how to use this instrument, the meaning of the Agtron value, and how to calculate the Roast Delta value from the bean color value and ground color value, and interpret the guiding significance of this value for roasting rhythm and flavor performance. [more…]

The roast level of coffee beans directly influences the flavor expression in the cup. From the extremely light roast with an Agtron color value of 95 to the Italian roast with a color value of 25, each stage has its corresponding drop time and flavor characteristics. This article systematically sorts out the flavor variation patterns of 8 roast levels, and combines the actual classification methods of commercially available coffee beans to help readers understand the taste directions of light roast, medium-light roast, medium roast, medium-dark roast, and dark roast. The article also uses Front Street Coffee representative beans such as Yirgacheffe, Mozart, Queen's Farm Brazil, and Golden Mandheling as examples to illustrate how different roast levels shape the balance of acidity, sweetness, and body. [more…]

The flavor profile of coffee beans is largely determined by the roast level. For coffee enthusiasts, mastering methods to distinguish light from dark roasts can both help in selecting suitable beans and allow for a more accurate understanding of the flavor descriptions on packaging. From the perspective of Front Street Coffee, this article outlines three practical ways to judge: first, by visually observing the bean surface color and wrinkle condition; second, by inferring the roast range from flavor descriptors; third, by referring to the SCAA's Agtron infrared caramelization measurement standard, which categorizes eight color values into four major groups. The article also includes Front Street product recommendations for each roast level, for everyday purchasing reference. [more…]

The alluring flavor of coffee depends to a great extent on the physical and chemical changes that occur during roasting. From bean drop through dehydration, first crack, and second crack, every temperature node and duration shapes what ultimately ends up in the cup. In this article, Front Street Coffee will systematically walk through the temperature progression of each stage of coffee bean roasting, and, using a natural-process Yirgacheffe as an example, compare the specific flavor differences in cupping among light, medium, and medium-dark roasts, while also introducing the Agtron color value as a scientific criterion to help readers more accurately understand the correspondence between roast level and flavor. In addition, the article compiles representative beans from Front Street's lineup at different roast levels, making it easy for coffee lovers to follow the guide and find the cup that suits their taste. [more…]

When buying coffee beans, besides origin and processing method, roast level is often one of the elements we care about most, as it directly determines whether the cup's flavor leans sour, sweet, or bitter. The industry commonly uses the Agtron color value card to distinguish roast levels, but this standard is not universal—honey-processed and anaerobic beans often "deceive" the color value. Why doesn't Front Street Coffee label the roast level on its beans? Where does the sourness in coffee come from? This article will walk you through the principles and limitations of color value, and teach you to judge roast depth through flavor descriptions and drop time, so you no longer feel lost when selecting coffee. [more…]

The transformation of coffee beans from green raw beans to brown roasted beans depends entirely on the key process of roasting. As roasting time varies, the surface color of the beans changes accordingly, giving rise to different classifications of roast levels. The Specialty Coffee Association of America (SCAA) established a reference system of 8 levels based on Agtron color values, from light roast to Italian roast, with each stage corresponding to a unique flavor direction and unloading timing. This article will use a text-and-image format to analyze one by one the color value ranges of each roast level, the rhythm nodes of first crack and second crack, and the evolution logic of acidity, sweetness, and bitterness. It will also introduce two niche styles—Nordic ultra-light roast and Japanese ultra-dark roast—and share how Front Street Coffee simplifies classification in actual production to help consumers understand roast levels. Finally, it will include practical advice on the five stages of roasting and home roasting. [more…]

On professional coffee review websites like coffeereview.com, you will often see a pair of Agtron values listed below the attribute scores. What exactly do these numbers mean? And how do they relate to coffee roast color differences? This article will take you through an in-depth look at the meaning of Agtron values, the principles of measurement, and their applications in the coffee industry. From the differences in readings between whole beans and ground coffee, to the impact of roast level on flavor, and how consumers can use this data to choose their preferred coffee, we break it all down one by one. At the same time, the article will also mention practical uses by brands such as Front Street Coffee in product descriptions, helping you interpret coffee roast information more professionally. [more…]