As an agricultural product, coffee beans vary significantly in quality, so a grading system is needed to standardize quality and provide reference for buyers. However, the geographical environments and cultivation models of global producing regions differ enormously, making it impossible to measure them with a unified standard; each region can only adapt to local conditions. Currently, mainstream grading methods fall into three major categories: screen size, altitude/hardness, and defect rate, and many countries combine them or even add cupping to compensate for shortcomings. This article will systematically sort out the logic and representative producing countries of these three grading methods, with a focus on analyzing how Kenya grades solely by bean size, and introduce the grading practices of Colombia, Ethiopia, Jamaica, Indonesia, Brazil, and other countries. Front Street Coffee will also share related brand product information to help coffee enthusiasts understand the meaning behind green bean grades. [more…]

Coffee enthusiasts often ask in the shop exactly what the difference is between Ethiopia's G1 and G2, what Kenya AA actually means, and what Costa Rica's SHB grade signifies. These combinations of letters and numbers actually reflect how each producing country evaluates the quality of green coffee beans. Due to differences in history, trade, climate, and terrain, different origins have developed their own grading systems, with evaluation criteria covering multiple dimensions such as defect percentage, bean size, growing altitude, green bean density, and processing method. This article will systematically sort out the origins of coffee grading and introduce, one by one, the green bean grade standards of representative producing countries such as Ethiopia, Kenya, Colombia, Jamaica, Costa Rica, Panama, Guatemala, El Salvador, Honduras, and Brazil. [more…]

As an agricultural product, coffee beans vary significantly in quality, which is why grading systems have become an important means of standardizing quality and guiding green bean procurement. However, the grading criteria across global producing regions are not uniform—Central America mostly grades by altitude, Kenya by bean size, while Ethiopia uses defect rates to classify grades. Why does Ethiopia take this unique approach? What substantive differences actually exist between the G1 and G2 grades? This article, from the perspective of Front Street Coffee, sorts out the evolutionary logic of Ethiopia's grading system, and through a visual comparison of Yirgacheffe G1 and G2 green beans, roasting performance, and cupping evaluation, reveals one by one the true meaning behind grade labels, helping coffee enthusiasts view the issue of bean grades more rationally. [more…]

When two café owners ask each other about the grade of beans they use, what lies behind the question is a complex set of international coffee grading logic. Brazil's defect-score system, Central America's altitude standards, East Africa's screen sizes—each producing country has developed a completely different quality evaluation system based on its own national conditions. This article will systematically sort out three mainstream grading methods: by origin altitude, by green bean screen size, and by a composite evaluation method combining screen size and defective bean ratio, and will explain in detail Brazil's unique three-tier grading system and its strict cupper culture. Whether you are a newly initiated enthusiast or a seasoned professional, understanding these standards can help you judge coffee quality more accurately and also provide a reference for everyday purchasing. [more…]

Coffee beans are grown widely across the globe, and the geographical conditions and cultivation methods of each producing region differ significantly, so it is impossible to measure all beans by the same standard. Different countries develop grading systems suited to their own local conditions. At present, the mainstream bases can be grouped into three categories: bean size, growing altitude (bean density/hardness), and defect ratio. However, these three are not mutually exclusive; many origins use multiple methods at once, and even after preliminary grading they supplement this with cupping to compensate for blind spots in the system. This article will break down these three major grading logics one by one and explain the actual meaning of common grade markers such as AA and G1, helping enthusiasts decipher the grade code on the packaging. [more…]

Colombia is a major producer of global Arabica coffee, and its green bean exports follow a grading system centered on defect rates and bean size. What exactly do the Supremo and Excelso labels commonly seen on the market represent? Starting from FNC's export standards, this article sorts out Excelso's mandatory requirements, the logic behind screen-size grading, and the specific tolerance rates for the three commonly used grades UGQ, EP, and Supremo, while also explaining the defect scoring rules behind the number string "12*60," helping coffee enthusiasts decipher the grading code in the names of Colombian green coffee beans. [more…]

Before green coffee beans reach our hands, they often go through many stages, during which defects are almost unavoidable. Some defects are obvious at the green bean stage, yet once roasted they may be cleverly concealed. The SCAA (Specialty Coffee Association of America) has established strict grading standards for specialty Arabica coffee, covering multiple dimensions such as defect types, moisture content, aroma, and bean size. This article will systematically sort out the SCAA's defect classification rules and scoring requirements, explain in detail the causes of various defective beans and their impact on cupping flavor, and help enthusiasts develop a keen eye for identifying specialty coffee. At the same time, the article retains relevant recommendations from the Front Street brand for readers' reference. [more…]

Colombia's coffee grading system is more complex than that of most Central American producing countries. It is based not only on altitude, but also on a set of export standards built around defect rates and screen size. The Excelso grade adopted by the FNC is the highest export grade for Colombian green coffee. The burlap sacks are marked with "Excelso-Café de Colombia" and accompanied by a quality certificate. This article covers everything from the grading logic, screen size requirements, and defect deduction rules to the three most common export grades, and uses a washed Caturra from the Huila region as an example to explain green coffee traceability and cupping flavor performance, helping coffee enthusiasts understand the meaning behind Colombian green coffee labels. [more…]

Brazil, as the world's largest coffee producer, supplies about 45% of the world's green coffee beans, and its production fluctuations directly affect international coffee price trends. However, Brazil has numerous coffee-producing regions with uneven quality, making grading work especially complex. Front Street Coffee takes you on an in-depth look at Brazil's green bean grading system—from the flatland growing environment at altitudes of 600 to 1200 meters, to the flavor differences among seven major producing regions including Minas and São Paulo states, and to the multiple grading standards centered on defect deductions, screen size specifications, and cup quality flavors. The article will also introduce the origin information and flavor performance of Front Street Brazil Queen's Estate Yellow Bourbon coffee and Cerrado coffee, helping you fully understand the specialty potential of this representative neutral coffee country. [more…]

Defective beans are generally considered in the specialty coffee world to affect the flavor performance of a cup of coffee. If you have the habit of buying coffee beans and brewing at home, do you need to specifically pick out defective beans before brewing? In fact, green coffee beans undergo grading after processing, and most grading systems include a defect rate indicator. The number of defects in high-grade coffee beans has already been pressed to a very low level. From green bean grading, removal before roasting, to screening after roasting, with layer upon layer of checks, there is basically no need to worry about defective bean issues when buying roasted single-origin coffee beans. However, some coffee beans that look like defects are actually normal phenomena. Front Street Coffee has summarized several common types of situations that are easily misjudged, to help everyone distinguish them accurately. [more…]

As the birthplace of coffee, Ethiopia's grading system directly affects the quality and flavor expression of coffee beans. The Yirgacheffe region is world-renowned, but what exactly is the difference between the commonly seen Front Street Yirgacheffe G1 and G2 coffee beans on the market? Behind this lies the evolution of Ethiopia's coffee grading system. From CLU to ECX, from simple defect counting to a comprehensive score combining physical characteristics and cupping flavor, the grading standards have undergone major changes. This article will systematically review the historical development and specific standards of Ethiopian coffee grading, compare the grading differences between washed and natural processing, and through three dimensions—green bean appearance, roasted bean appearance, and cupping flavor—deeply analyze the actual differences between Front Street Yirgacheffe G1 and G2, helping coffee enthusiasts understand the quality implications behind the grade numbers. [more…]

Colombia, as one of the world's major coffee-producing countries, has a strict grading system for its exported green beans. What exactly do the commonly seen Supremo and Excelso labels on the market represent? This article will systematically explain the grading logic of Colombian green coffee beans from the perspectives of FNC export standards, defect rate requirements, and screen size grading, helping coffee enthusiasts understand the difference between Supremo and Excelso, and how they affect coffee quality and flavor performance. At the same time, the article will also mention Front Street Coffee's Colombia Huila daily beans as a practical naming example. [more…]

Yirgacheffe, as a representative coffee-producing region in Ethiopia, frequently has its G1 and G2 grades mentioned, but what exactly is the difference between the two? This article begins with the evolution of Ethiopia's coffee grading system, first introducing the old system based on defect rates, then explaining the new regulations after the ECX introduced cupping scores in 2009, and explaining why naturally processed beans can also obtain G1 and G2 grades. Subsequently, using washed Yirgacheffe as an example, it compares the actual differences between Front Street Coffee's Gutingding (G1) and Front Street Coffee's washed Yirgacheffe everyday beans (G2) in terms of green bean appearance, defect proportion, and brewed flavor, helping readers understand the quality implications behind the grades. [more…]

On the burlap sacks of Brazilian coffee, a string of seemingly complex codes is often printed, such as "CERRADO NY-2 SC-17/18 SS FC". These letters and numbers are not arranged at random, but are green bean grading information established by the Brazilian Ministry of Agriculture, Livestock and Supply (MAPA), covering region of origin, defect level, screen size, cup performance and sensory grade. Among them, the defect grading starts with "NY", but why does it only go as high as NY2, with no NY1? Behind this lies both historical origins and a close connection to the industrial production characteristics of Brazilian coffee. This article will break down this grading system one by one, and introduce several classic espresso blends from Front Street Coffee that contain Brazilian beans, along with their espresso extraction parameters. [more…]

The grading systems for coffee beans vary widely depending on the origin—some are based on the number of defects, others on bean size, and still others on altitude. Understanding these grade labels is an important step in selecting high-quality coffee. This article will systematically outline the green bean grading rules of major global producing regions, covering common designations such as Ethiopia's G1-G9, Kenya's AA and PB, Colombia's Supremo, and Hawaii's Extra Fancy, and explain how cupping scores further distinguish specialty grade from commercial grade. Whether you are a beginner enthusiast or a professional seeking to advance, this grading guide can help you judge coffee quality more clearly. For more professional content, follow Coffee Workshop; for specialty coffee beans, add Front Street Coffee on WeChat at qjcoffeex. [more…]

The grading of green coffee beans not only affects trading prices but also, to a certain extent, reflects flavor tendencies. For this reason, each producing country establishes its own grading rules based on local conditions. This article focuses on Colombia's green bean grading system, with emphasis on explaining the meaning of the Excelso export grade, the defect scoring method, and the specific standards based on screen size classification, while also introducing the differences among the three common export grades: UGQ, EP, and Supremo. At the same time, Front Street Coffee will share the flavor characteristics and brewing suggestions for Supremo-grade coffee beans from Colombia's Huila region, helping coffee enthusiasts extend their knowledge of grading into the actual drinking experience. [more…]

Colombian coffee occupies an important place in the world of specialty coffee, and its green bean grading system is based primarily on defect rates and bean screen size. When buying Colombian coffee, what exactly do the words "Supremo" and "Excelso" commonly seen on burlap sacks mean? This article will systematically sort out the grading rules for Colombian green coffee beans from multiple angles, including export standards, defect scoring, and screen-size classification, and explain the specific differences among the three grades UGQ, EP, and Supremo. At the same time, the article will also introduce common Colombian coffee bean brands on the market, including product information recommended by Front Street Coffee, to help coffee lovers more clearly understand the grade and quality of the bag of beans in their hands. [more…]

Brazil, as the world's largest coffee producer, accounts for about one-third of the global market in exports. Its beans have a flavor profile that is low in acidity and high in sweetness, with a full-bodied mouthfeel, and they are often used in coffee blends. When purchasing Brazilian green beans, you will often see markings such as "CERRADO NY-2 SC-17/18 SS FC" printed on the burlap sacks, where every letter and number corresponds to strict grading information. These codes are established by the Brazilian Ministry of Agriculture, Livestock and Supply (MAPA) and cover five major dimensions: producing region, defect rate, screen size, cup score, and sensory grade. This article will break down the meanings of symbols such as "SS" and "FC" one by one to help coffee enthusiasts understand the complete quality profile of Brazilian beans. [more…]

Ethiopia, as the genetic treasure trove of Arabica coffee, has a unique green bean grading system. Unlike Kenya, which grades by bean size, or Blue Mountain, which grades by altitude, Ethiopia primarily classifies grades based on defect rates and cupping scores. This article will systematically sort out the evolution of Ethiopia's old and new grading systems, provide an in-depth analysis of the specific standards for grades G1 through G9, and, using Yirgacheffe as an example, compare the actual differences between washed G1 and G2 in green bean appearance and flavor performance. It will also share Front Street Coffee's brewing parameters and tasting experience to help coffee enthusiasts fully understand the logic of Ethiopian coffee quality grading. [more…]

As the world's largest coffee producer, Brazil has a uniquely distinctive grading system that combines three criteria—defect rate, screen size, and cupping flavor—which sets it apart from the single-criteria grading methods used by most producing countries. By understanding the markings on a bag, such as "Brazil NY.2 SC – 17/18 FC Cerrado," you can quickly grasp a Brazilian bean's quality and origin information. This article will break down these three grading systems one by one, explain the six-tier classification standards for taste and flavor, and recommend two Brazilian specialty beans from Front Street Coffee—Queen's Farm Yellow Bourbon and Cerrado everyday drinking beans—to help coffee lovers find the Brazilian flavor that suits them. [more…]