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Who Makes The
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Coffee Answers

EVERYTHING YOU EVER WANTED TO KNOW ABOUT COFFEE.

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Six coffee questions, answered without the attitude.

Plain-English answers drawn from the Specialty Coffee Association, World Coffee Research and the National Coffee Association. These explain general coffee knowledge, not the scores or identity of any untested coffee. The full searchable answer bank is available below when you need something more specific.

Are tasting notes ingredients added to coffee?

Usually not. Notes such as citrus, cocoa or jasmine describe aromas and flavors a taster perceives in brewed coffee; they are not an ingredient list. Flavored coffees are a separate category. A roaster's tasting notes are its descriptions, not proof that we independently tasted that bag.

Why this matters: A descriptive assessment records perceived sensory characteristics. It is separate from an evaluator's judgment of quality.

Explore the flavor wheelSource: Specialty Coffee Association — Coffee Value Assessment

What is the difference between washed, natural and honey coffee?

In broad terms, washed coffee is depulped and its mucilage is removed before drying; natural coffee dries inside the whole cherry; honey coffee is depulped but dried with some mucilage remaining. These process labels do not guarantee a particular flavor or a higher score.

Why this matters: Processing choices influence fermentation and drying, but variety, ripeness, handling and roasting also affect the cup.

Compare coffee processesSource: National Coffee Association — Coffee Processes

Is Arabica a coffee variety?

Arabica is a species, Coffea arabica. Bourbon, Typica, and many other named lines are varieties within that species. A variety name can help explain agronomic traits, but it cannot identify a farm or establish that a particular lot tastes a certain way.

Why this matters: Growing environment, plant health and postharvest decisions matter alongside genetics.

Understand coffee geneticsSource: World Coffee Research — Arabica catalog

Is dark roast stronger than light roast?

Dark roast can taste more bitter or intensely roasted, but that does not by itself mean it contains more caffeine. Roast color labels are not uniform across companies. Compare the same coffee brewed at the same dose before attributing flavor or strength to roast alone.

Why this matters: Roast degree affects flavor, while brewing dose and recipe affect the concentration in your cup.

Read the roasting guideSource: National Coffee Association — Coffee Roasts

How should I store whole-bean coffee?

Keep beans in an airtight, opaque container in a cool, dry, dark place, away from moisture and heat. Grind just before brewing when practical. Freshness depends on the roast, packaging and how the coffee has been stored; a single universal peak-freshness date is not reliable for every bag.

Why this matters: Air, light, warmth and moisture all speed flavor loss or create storage problems.

Explore brewing methodsSource: National Coffee Association — Storage and Shelf Life

Can one tasting score prove which coffee is best?

No. A score reflects a particular evaluation method, sample and taster or panel. The Specialty Coffee Association distinguishes sensory descriptions, judgments of quality, physical characteristics and information such as origin traceability. We publish our own scores only for coffees actually brewed and reviewed by us.

Why this matters: A competition result, a roaster's flavor description and an independent tasting score answer different questions; they should not be converted into one universal ranking.

How we research and rate coffeeSource: Specialty Coffee Association — Coffee Value Assessment

Research update · Genetics

Is Pink Bourbon actually a Bourbon?

Genetic tests reported by Cafe Imports in 2017 and 2023 indicate that sampled Pink Bourbon material belongs closer to Ethiopian landrace ancestry than the traditional Bourbon variety. The older Red × Yellow Bourbon origin story should not be repeated as established fact.

A farmer or roaster may use Pink Bourbon as the trade name for a pink-cherry coffee; a name and cherry color do not prove genetic parentage. Some tested samples had mixed markers, so the identity of any particular lot still needs evidence.

Read the corrected comparisonSource: Cafe Imports — Pink Bourbon genetics report (2023)

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COFFEE GRADINGAnswer

What is the purpose of the SCA coffee grading protocol?

The SCA coffee grading protocol provides a standardized, objective framework for evaluating coffee quality. By establishing consistent industry standards for physical inspection and sensory analysis, it allows producers, exporters, and roasters to communicate effectively about the value and quality of green coffee, ensuring that specialty coffee meets specific benchmarks for cleanliness, uniformity, and flavor potential.

COFFEE GRADINGSpecialty coffeeCupping
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How do I know if my coffee is specialty grade?

You can identify specialty-grade coffee by looking for a score of 80 points or higher on the SCA 100-point scale, typically provided by a certified Q grader. Additionally, specialty coffee must be free of primary defects and have no more than five secondary defects in a 350-gram sample, ensuring a clean, high-quality cup that reflects its origin.

COFFEE GRADINGSpecialty coffeeCupping
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What is the difference between primary and secondary coffee defects?

Primary defects are severe flaws, such as black or sour beans, that significantly ruin the flavor of a cup of coffee. Secondary defects are less severe, such as broken or chipped beans, which have a smaller impact on taste but still indicate poor processing. Specialty grade coffee allows for zero primary defects and very few secondary ones.

COFFEE GRADINGSpecialty coffee
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What is the role of a coffee cupper in grading?

A coffee cupper is a trained sensory professional who evaluates coffee quality through a standardized process called cupping. Their role is to objectively assess attributes like fragrance, flavor, acidity, and body to assign a score. This sensory analysis is essential for grading, as it determines whether a coffee meets the specialty grade threshold and helps define its market value.

COFFEE GRADINGCuppingSpecialty coffee
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How are coffee defects counted in a 300g sample?

Coffee defects are counted by manually inspecting a 300g sample of green coffee beans. A trained grader identifies and categorizes each bean based on specific defect types, such as black, sour, or insect-damaged beans. These are then tallied according to the SCA standards to determine the coffee's grade, ensuring it meets the requirements for specialty or commercial classification.

COFFEE GRADINGSpecialty coffee
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What is a 'full defect' in coffee grading?

A 'full defect' is a standardized unit used in SCA green coffee grading to quantify the impact of imperfections on cup quality. Rather than counting every single damaged bean, graders convert various types of defects—such as black beans, sour beans, or insect damage—into a single numerical value based on their severity, with specialty coffee allowing zero primary defects.

COFFEE GRADINGSpecialty coffeeCupping
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What is the difference between SHB and SHG coffee grading?

SHB (Strictly Hard Bean) and SHG (Strictly High Grown) are both quality classifications based on the altitude at which coffee is grown. While the terms are often used interchangeably, SHB typically refers to coffee grown at the highest elevations (usually above 1,200–1,500 meters), resulting in denser, higher-quality beans, whereas SHG is a broader term for high-altitude coffee.

COFFEE GRADINGAltitudeSpecialty coffee
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Why do some countries grade coffee by screen size?

Countries grade coffee by screen size to ensure uniformity, which is critical for consistent roasting. Beans of similar size absorb heat at the same rate, preventing uneven roasts where some beans burn while others remain under-developed. This physical sorting, measured in 64ths of an inch, helps producers maintain quality standards and market their coffee effectively.

COFFEE GRADINGRoasting
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What does 'UGQ' mean on a bag of coffee?

UGQ stands for 'Usual Good Quality.' It is a classification term, most commonly associated with Colombian coffee, indicating a standard export grade. While it represents a reliable, decent quality, it typically sits below premium or specialty-grade classifications and may contain more minor defects or variations in bean size than higher-tier selections.

COFFEE GRADINGSpecialty coffeeColombia
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What is the difference between Grade 1 and Grade 5 Ethiopian coffee?

The difference between Grade 1 and Grade 5 Ethiopian coffee lies in the number of physical defects and the resulting cup quality. Grade 1 is the highest specialty tier, featuring minimal defects and exceptional flavor, while Grade 5 is a commercial-grade coffee with a significantly higher defect count, often resulting in less clarity and lower flavor complexity.

COFFEE GRADINGSpecialty coffeeTerroir
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How do you read a coffee grading label?

Reading a coffee grading label involves identifying key information like the origin, processing method, variety, and quality grade. Labels often include details such as the farm or cooperative name, altitude, and roast date. Understanding these terms helps you make informed choices about the flavor profile and quality of the coffee you are purchasing.

COFFEE GRADINGSpecialty coffeeWashed
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Does a higher screen size always mean better coffee?

No, a higher screen size does not guarantee better coffee. Screen size simply indicates the physical size of the green coffee bean, which is used for sorting and consistency during roasting. While larger beans are often associated with higher quality, flavor is determined by factors like altitude, variety, and processing, not just bean size.

COFFEE GRADINGSpecialty coffeeTerroir
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What is the 'New York Coffee Exchange' grade?

The 'New York Coffee Exchange' grade refers to the specific quality standards set by the Intercontinental Exchange (ICE) for Arabica coffee traded on the global commodity market. To be considered 'exchange grade,' green coffee must meet strict physical requirements, including specific defect counts and moisture levels, allowing it to be legally delivered against a Coffee C futures contract.

COFFEE GRADINGSpecialty coffeeBlends
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What is the difference between Arabica and Robusta grading?

Arabica and Robusta are distinct species, *Coffea arabica* and *Coffea canephora*, requiring different grading standards. Arabica is typically graded using the Specialty Coffee Association (SCA) system, which focuses on flavor complexity and defect counts. Conversely, Robusta is often evaluated through 'Fine Robusta' protocols, as its inherent bitterness and higher caffeine content necessitate different quality benchmarks than those used for Arabica.

COFFEE GRADINGSpecialty coffeeCupping
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What is the difference between SHB and HB coffee grades?

The difference between SHB (Strictly Hard Bean) and HB (Hard Bean) is primarily based on the altitude at which the coffee is grown. SHB is grown at higher elevations, resulting in a denser, harder bean with more complex flavors, while HB is grown at slightly lower elevations, producing a bean that is still high quality but less dense.

COFFEE GRADINGAltitudeSpecialty coffee
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How does color affect green coffee grading?

Color is a vital visual indicator in green coffee grading, signaling freshness and processing quality. A uniform, vibrant green or bluish-green color typically indicates a fresh, well-processed bean. Conversely, pale, yellow, or brownish colors often suggest that the coffee is old, has been stored improperly, or has suffered from poor drying, all of which negatively impact the final cup quality.

COFFEE GRADINGSpecialty coffeeTypica
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Why is altitude important in coffee grading?

Altitude is a primary factor in coffee grading because it directly influences bean density and hardness. Higher elevations result in cooler temperatures, which slow the coffee cherry's maturation process. This extended growth period allows the bean to develop more complex sugars and acids, resulting in a denser, harder bean that is highly prized for its superior flavor profile.

COFFEE GRADINGAltitudeTerroir
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How does moisture content affect green coffee grading?

Moisture content is a critical metric in green coffee grading, typically required to be between 10% and 12% for specialty coffee. If moisture is too high, the coffee is susceptible to mold and rapid degradation during storage. If it is too low, the beans may have been over-dried, leading to a loss of flavor and a brittle, inconsistent roast.

COFFEE GRADINGSpecialty coffeeTypica
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What is the difference between a microlot and a standard lot?

A microlot is a small, highly traceable batch of coffee selected for its exceptional quality or unique characteristics, often from a specific part of a farm. In contrast, a standard lot is a larger, more general collection of beans from multiple farms or a wider area, prioritized for consistency and volume rather than distinct, individual flavor profiles.

COFFEE GRADINGSpecialty coffeeSingle origin
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How does bean density affect coffee grading?

Bean density is a critical indicator of coffee quality, as higher-density beans generally grow at higher altitudes and develop more complex flavors. In grading, denser beans are preferred because they are more uniform, roast more evenly, and possess a higher concentration of sugars and acids, which directly translates to a superior, more flavorful cup of coffee.

COFFEE GRADINGAltitude
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Why do some countries use screen size for grading?

Countries use screen size for grading to ensure uniformity in bean size, which is essential for consistent roasting. Beans are passed through metal plates with specific hole diameters; those that remain on the screen are classified by size. Uniform beans roast at the same rate, preventing the common issue of having some beans under-roasted while others are burnt.

COFFEE GRADINGRoasting
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What is the difference between specialty grade and commercial grade coffee?

Specialty grade coffee is defined by its high quality, scoring 80 points or higher on the 100-point SCA scale, with minimal defects. Commercial grade coffee is lower quality, often mass-produced, and may contain significant defects. The difference lies in the care taken during harvesting, processing, and sorting, which directly impacts the flavor, complexity, and overall drinking experience.

COFFEE GRADINGSpecialty coffee
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What is the difference between Grade 1 and Grade 5 coffee?

The difference between Grade 1 and Grade 5 coffee is determined by the number of defects found in a 300g sample. Grade 1 is the highest quality, often called 'Specialty Grade,' with virtually no primary defects and very few secondary defects. Grade 5 is a lower-quality commercial grade, containing a significantly higher number of defects that negatively impact flavor and consistency.

COFFEE GRADINGSpecialty coffee
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What is the Q-grading system for coffee?

The Q-grading system is a standardized method for evaluating coffee quality, developed by the Coffee Quality Institute (CQI). It uses trained professionals, known as Q Graders, to score coffee on a 100-point scale based on sensory attributes like aroma, acidity, body, and flavor. Coffees scoring 80 points or higher are officially classified as specialty coffee.

COFFEE GRADINGCuppingSpecialty coffee
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What does an 85 cupping score mean?

An 85 cupping score indicates that a coffee is classified as "Excellent" within the specialty coffee grading scale. According to SCA standards, any coffee scoring 80 or above is considered specialty grade, but an 85+ score signifies a higher tier of quality, often associated with more complex flavor profiles, superior processing, and greater consistency compared to entry-level specialty beans.

COFFEE GRADINGSpecialty coffeeCupping
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What is the difference between specialty grade and commodity coffee?

The difference lies in quality and grading standards. Specialty coffee is high-quality, traceable coffee that scores 80 points or higher on the 100-point SCA scale, with no primary defects. Commodity coffee is mass-produced, lower-quality coffee traded on the global market, often with little regard for origin, processing, or specific flavor profiles, and is typically sold at lower price points.

COFFEE GRADINGSpecialty coffeeCupping
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How are coffee defects counted during grading?

Coffee defects are counted by analyzing a standard 350-gram sample of green coffee. Graders manually inspect the beans, identifying specific physical flaws—such as black beans, sour beans, or insect damage—and assigning them a numerical value based on the severity of the defect. These values are then totaled to determine the coffee's grade and quality classification.

COFFEE GRADINGSpecialty coffee
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How do professional coffee graders calibrate their palate?

Professional coffee graders, or Q Graders, calibrate their palates through rigorous sensory training and regular cupping sessions. This process involves identifying and quantifying specific flavor attributes, such as acidity, body, and sweetness, using standardized protocols. By repeatedly tasting diverse coffee samples alongside peers, they ensure their subjective evaluations align with industry-wide benchmarks for quality and consistency.

COFFEE GRADINGCuppingSpecialty coffee
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Why are some coffee beans graded by color?

Coffee beans are graded by color to identify their freshness, moisture content, and potential defects. Green coffee that is vibrant and uniform in color typically indicates high quality and proper processing. Conversely, beans that are pale, discolored, or mottled may suggest age, improper storage, or the presence of defects like mold or insect damage, which can ruin the flavor.

COFFEE GRADINGSpecialty coffeeTypica
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Does a higher altitude always mean a higher coffee grade?

While higher altitude is strongly associated with higher coffee quality, it does not automatically guarantee a higher grade. Altitude slows the maturation of the coffee cherry, leading to denser, more flavorful beans, but quality also depends on soil, variety, processing, and post-harvest care. A high-altitude bean can still be low-grade if it is poorly processed or contains defects.

COFFEE GRADINGAltitudeSpecialty coffee
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How does the SCA cupping protocol work?

The SCA cupping protocol is a standardized sensory analysis method used to evaluate coffee quality objectively. It involves brewing a specific ratio of coffee to water in uniform vessels, then assessing the aroma, flavor, acidity, body, and aftertaste at specific time intervals. This consistency allows professionals to grade coffee accurately and compare samples from different origins on a level playing field.

COFFEE GRADINGCuppingSpecialty coffee
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How is the "overall" score determined in coffee cupping?

The 'overall' score in coffee cupping is a subjective assessment that reflects the cupper's holistic impression of the coffee's quality. It is one of the ten categories on the SCA cupping form, where the cupper rates the coffee based on their personal experience, taking into account the balance, harmony, and intensity of all the previously scored attributes.

COFFEE GRADINGCuppingSpecialty coffee
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What is the difference between commercial grade and specialty grade?

The primary difference between commercial and specialty grade coffee lies in quality control and sensory evaluation. Specialty coffee is graded using the SCA protocol, scoring 80 points or higher on a 100-point scale, and is free of primary defects. Commercial coffee, often called commodity coffee, is typically lower-scoring, may contain defects, and is traded based on volume rather than specific flavor profiles.

COFFEE GRADINGSpecialty coffeeCupping
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How does fermentation time influence coffee grading?

Fermentation time is a critical variable in coffee processing that directly dictates flavor development and cup quality. Extending or shortening the duration alters microbial activity, which can either enhance desirable fruity and acidic notes or introduce sensory defects. Consequently, fermentation duration is a primary factor in determining whether a lot achieves a high specialty grade or is downgraded due to over-fermentation.

COFFEE GRADINGFermentationSpecialty coffee
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How does moisture content affect coffee grading?

Moisture content is a critical quality metric for green coffee, typically targeted between 10% and 12% for export. Levels outside this range affect grading by increasing the risk of mold, microbial growth, or structural degradation. Proper moisture levels ensure stable storage and consistent roasting, while water activity provides a more precise measure of the water available for chemical reactions and spoilage.

COFFEE GRADINGSpecialty coffeeWater
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What is the purpose of the cupping form?

The cupping form serves as a standardized tool for sensory evaluation, allowing professionals to record and quantify the quality of coffee. By using the SCA scoring system, it provides a consistent framework to assess specific attributes like acidity, body, and flavor, ultimately helping to distinguish specialty coffee from commercial grades through objective tasting notes and numerical data.

COFFEE GRADINGCuppingSpecialty coffee
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What is the difference between washed and natural process grading?

The primary difference lies in how the fruit is removed before drying. Washed coffees are de-pulped and fermented to remove all fruit flesh, resulting in cleaner, more consistent bean appearance and flavor. Natural process coffees are dried with the fruit intact, which often leads to more varied bean appearance and bolder, fruit-forward flavor profiles due to prolonged contact with the cherry.

COFFEE GRADINGWashedNatural
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What is the significance of the "faults" section on a cupping form?

The faults section on a cupping form is used to identify and penalize sensory defects that negatively impact cup quality. By distinguishing between 'taints' (minor off-flavors) and 'faults' (intense, unpleasant characteristics), graders can objectively quantify how much a sample deviates from specialty standards, ensuring that only clean, high-quality coffee reaches the consumer.

COFFEE GRADINGCuppingSpecialty coffee
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What is the difference between Grade 1 and Grade 2 coffee?

Grade 1 and Grade 2 coffee are distinguished primarily by their physical defect count within a 350-gram sample. Grade 1 (Specialty Grade) requires zero primary defects and no more than five secondary defects, while Grade 2 (Premium) allows up to eight secondary defects. Both grades must meet specific moisture content and screen size requirements, but only Grade 1 is consistently held to the specialty threshold of scoring 80 points or higher on the SCA cupping scale.

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What is a Q Grader?

A Q Grader is a professional certified in sensory analysis who evaluates coffee quality using standardized protocols. By passing a rigorous series of 19 exams, they gain the ability to provide objective, industry-recognized scores for Arabica coffee. This credential serves as a common language between producers and buyers, ensuring that quality assessments remain consistent across the global supply chain, from the farm gate to the final roast.

COFFEE GRADINGArabica
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What is coffee cupping?

Coffee cupping is a standardized sensory evaluation method used by professionals to objectively assess the quality, flavor profile, and defects of coffee. By controlling variables like grind size, water temperature, and infusion time, tasters can compare different lots side-by-side. This process is essential for producers and buyers to determine market value, identify quality improvements, and ensure consistency from the farm to the roastery, ultimately distinguishing specialty-grade coffee from commodity-grade beans.

COFFEE GRADINGGrindingWater
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What are coffee defects and how do they affect taste?

Coffee defects are physical abnormalities in green coffee beans, such as black, sour, or fungus-damaged beans, that negatively impact cup quality. These flaws are categorized as primary or secondary based on severity. Primary defects cause significant, often foul, flavor taints, while secondary defects are less severe but still degrade the overall coffee quality and consistency of the final brew.

COFFEE GRADINGSpecialty coffeeCupping
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How do I identify a specialty grade coffee bean?

You can identify specialty-grade coffee by looking for transparency in labeling, such as the farm name, region, and processing method. Physically, the beans should be uniform in size and color, free of defects like black or broken beans. Ultimately, specialty grade is confirmed by a cupping score of 80 or higher on the 100-point SCA scale.

COFFEE GRADINGSpecialty coffeeCupping
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How does bean size affect coffee grading?

Bean size, measured by screen size, is a key metric in coffee grading that indicates uniformity and potential quality. Larger, more uniform beans often roast more evenly, leading to a balanced flavor profile. While size alone does not guarantee quality, it is a standard physical attribute used to sort beans and ensure consistency in the final roast.

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Why is high altitude coffee considered better?

High altitude coffee is considered better because the cooler growing conditions at higher elevations cause the coffee cherries to mature more slowly. This extended maturation period allows the beans to develop higher bean density and a more complex concentration of sugars and acids, resulting in superior coffee quality and more nuanced flavor profiles compared to lower-grown crops.

COFFEE GRADINGAltitudeSpecialty coffee
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What are primary vs secondary coffee defects?

Primary coffee defects are severe flaws that significantly impact the cup quality, such as full black beans, sour beans, or foreign matter, and are strictly limited in specialty grading. Secondary defects are less severe, such as broken or chipped beans, which affect the cup quality to a lesser degree but are still monitored to maintain overall bean quality standards.

COFFEE GRADINGSpecialty coffeeCupping
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What are the most common coffee bean defects?

The most common coffee bean defects include quakers (unripe beans that fail to roast properly), black beans (caused by over-fermentation or death on the tree), sour beans (resulting from improper processing), and broken or insect-damaged beans. These defects are identified during green coffee grading and are removed to ensure the final cup is clean, sweet, and free of off-flavors.

COFFEE GRADINGSpecialty coffeeCupping
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How does the SCAA grading system work?

The SCAA (now SCA) grading system evaluates green coffee based on physical defects and sensory quality. A 350-gram sample is inspected for primary and secondary defects, and the coffee is then cupped to assign a score. To be classified as 'specialty grade,' the coffee must have zero primary defects and a cupping score of 80 points or higher.

COFFEE GRADINGSpecialty coffeeCupping
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What is the significance of the 100-point coffee scale?

The 100-point coffee scale is a standardized sensory evaluation protocol used to quantify green coffee quality, where a score of 80 or above designates 'specialty' grade. Developed by the Specialty Coffee Association, it provides a common language for buyers and producers to assess flavor, aroma, and physical defects. While it facilitates global trade and price benchmarking, the score is a subjective snapshot of a specific roast at a specific time, rather than an absolute or immutable measure of a coffee's inherent value.

COFFEE GRADINGSpecialty coffee
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What does a Q-Grader do?

A Q-Grader is a professional certified by the Coffee Quality Institute (CQI) to evaluate Arabica coffee quality using standardized sensory protocols. By assigning a numerical score based on the Coffee Value Assessment (CVA) system, they provide a universal language that allows farmers, exporters, and roasters to objectively communicate coffee quality. This certification validates a professional's ability to identify defects, assess flavor profiles, and determine whether a coffee meets the industry-recognized 'specialty' threshold of 80 points or higher.

COFFEE GRADINGArabicaSpecialty coffee
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What is the difference between washed and natural process in grading?

The primary difference between washed and natural processing is the amount of fruit left on the bean during drying. Washed coffee has the cherry and mucilage removed before drying, resulting in a cleaner, acidity-forward cup. Natural coffee is dried with the entire cherry intact, allowing the bean to absorb sugars from the fruit, which creates a heavier body and intense, fruit-forward sweetness. These methods dictate how producers manage fermentation, water usage, and final physical grading standards.

COFFEE GRADINGWashedNatural
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What is the difference between screen size and density in coffee grading?

Screen size measures the physical dimensions of a coffee bean, while density measures its mass relative to its volume. Screen size is determined by passing beans through standardized sieves measured in 64ths of an inch to ensure roasting uniformity. Density, often correlated with high-altitude growth, indicates the bean's cellular structure and sugar concentration. While larger beans are often denser, these metrics are distinct: screen size governs physical sorting, whereas density informs the thermal energy required during the roasting process.

COFFEE GRADINGAltitudeRoasting
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What are the SCA standards for specialty coffee?

Specialty coffee is defined by the Specialty Coffee Association (SCA) as green coffee that scores 80 points or higher on the 100-point SCA Cupping Form, contains zero primary defects, and no more than five secondary defects per 350g sample. Beyond these sensory and physical thresholds, the classification requires 100% Arabica beans with specific moisture content (10.5–12.5%) and water activity (≤0.60), ensuring a standardized benchmark for quality that transcends origin, price, or marketing claims.

COFFEE GRADINGArabicaWater
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How to identify 'stinkers' in coffee batches?

Identifying 'stinkers' requires a combination of visual inspection and sensory analysis. In green coffee, look for beans with unusual discoloration or signs of over-fermentation. During cupping, these defects are identified by their sharp, acetic, or vinegar-like aroma and flavor. Because they are potent, even a small number of these beans can significantly impact the quality of an entire batch.

COFFEE GRADINGFermentationSpecialty coffee
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What is the significance of the 'Cup of Excellence' competition?

The 'Cup of Excellence' (CoE) is the most prestigious competition and auction for high-end coffee, designed to identify and reward the best coffees produced in a specific country. Its significance lies in its rigorous quality standards, which help farmers gain international recognition and receive significantly higher prices for their award-winning, high-quality lots.

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What are the criteria for grading Ethiopian coffees?

Ethiopian coffee grading is primarily based on a combination of physical inspection and sensory evaluation. Coffees are classified into grades (1 through 9) based on the number of defects found in a 300-gram sample, while also considering the cup quality, regional classification, and processing method. This system ensures that the unique characteristics of Ethiopian origins are preserved and recognized.

COFFEE GRADINGSpecialty coffeeEthiopia
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How does bean uniformity impact roast quality?

Bean uniformity is critical for roast consistency, as beans of similar size and density absorb heat at the same rate. When bean size varies significantly, smaller or denser beans may over-roast while larger or less dense ones remain underdeveloped. Achieving even roasting through careful quality control ensures a balanced flavor profile and prevents defects like burnt or sour notes.

COFFEE GRADINGRoasting
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What is a 'quaker' bean and why is it a defect?

A 'quaker' is an underdeveloped coffee bean that fails to roast properly, remaining light-colored and hard even after the rest of the batch is finished. It is considered a significant roast defect because it lacks the sugars and oils necessary for flavor development, resulting in unpleasant, peanut-like, or grassy notes that can ruin the quality of an entire cup.

COFFEE GRADINGBitternessAstringency
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What is a 'peaberry' bean and how is it graded?

A peaberry is a natural bean mutation where the coffee cherry develops a single bean instead of the usual two. Graded based on size and uniformity, peaberries are physically separated through screen sorting. While often prized for a unique, concentrated flavor profile and high quality perception, their classification as a separate grade is primarily a result of their distinct shape and size.

COFFEE GRADINGSpecialty coffee
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How do different processing methods affect coffee grade?

Different processing methods—such as washed, natural, and honey processes—dramatically affect the coffee grade by influencing the flavor profile, physical appearance, and consistency of the beans. The washed process often yields the cleanest cup, while natural and honey processes can produce more body and sweetness, though they require meticulous drying control to avoid defects and maintain quality standards.

COFFEE GRADINGTerroirFermentation
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How does altitude affect coffee bean quality and sustainability?

High altitude coffee is generally prized for its quality because the cooler temperatures slow the ripening process, allowing more complex sugars and acids to develop in the bean. This results in greater bean density and more sophisticated flavor profiles. From a sustainability perspective, high-altitude farms often require different management strategies, such as intensive shade practices, to protect soil and biodiversity.

COFFEE GRADINGAltitude
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How is moisture content measured in green coffee?

Moisture content in green coffee is measured using calibrated moisture meters, which utilize capacitance technology to provide rapid, accurate readings. While the traditional oven-drying method serves as the ISO-standard reference for laboratory calibration, modern roasters and quality control professionals rely on portable electronic moisture meters to ensure beans remain within the ideal 10–12% range for optimal stability and storage.

COFFEE GRADINGFreshness & storage
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COFFEE GRADINGAnswer

How are coffee defects classified?

Coffee defects are classified into primary and secondary categories based on their impact on cup quality and safety. Primary defects, such as black or sour beans, are considered severe and can ruin a batch, while secondary defects, like minor insect damage or broken beans, have a less significant impact. Grading systems use these classifications to determine the overall quality and market value of the coffee.

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COFFEE GRADINGAnswer

What is the difference between SHB and HB grading?

SHB (Strictly Hard Bean) and HB (Hard Bean) are altitude-based grading tiers used primarily in Central America to denote bean density. SHB indicates coffee grown at higher elevations, where cooler temperatures slow cherry maturation, resulting in denser, more complex beans. HB represents coffee grown at mid-range elevations, offering a balanced profile but lacking the extreme density of SHB.

COFFEE GRADINGSpecialty coffeeTerroir
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COFFEE GRADINGAnswer

What does 'screen size' indicate in coffee grading?

Screen size indicates the physical dimensions of coffee beans, measured in 1/64th-inch increments using standardized perforated screens. This process of bean sorting ensures uniformity, which is a key quality indicator for roasters. While larger beans are often associated with higher quality, screen size primarily serves to create a consistent lot, allowing for more predictable heat transfer during the roasting process.

COFFEE GRADINGSpecialty coffeeRoasting
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COFFEE GRADINGAnswer

How does coffee bean density affect roasting and flavor?

Coffee bean density is a critical factor in roasting, as it dictates how heat is transferred and absorbed by the bean. Denser beans, often grown at higher altitudes, require more energy to roast and can develop more complex, nuanced flavors. Understanding density allows roasters to adjust their roast profiles for better consistency, ensuring the bean's structure is fully developed without burning.

COFFEE GRADINGSpecialty coffeeAltitude
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COFFEE GRADINGAnswer

How do machines sort coffee beans for grading?

Machines sort coffee beans for grading using advanced optical sorters that scan each bean for color, size, and shape. These automated grading systems use high-speed cameras and sensors to identify and eject defective beans, such as those that are discolored, broken, or insect-damaged. This technology ensures high levels of consistency and efficiency, which are essential for maintaining quality control in large-scale coffee production.

COFFEE GRADINGSpecialty coffee
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COFFEE GRADINGAnswer

What are 'stinkers' in coffee batches?

Stinkers are green coffee beans that have undergone severe over-fermentation, resulting in a distinct, unpleasant acetic, briny, or vinegar-like aroma. These fermentation defects occur when microbial activity penetrates the seed, often due to delays in processing or stagnant pockets within fermentation tanks. Even a single stinker can introduce significant off-flavors, compromising the quality of an entire batch.

COFFEE GRADINGFermentationSpecialty coffee
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COFFEE GRADINGAnswer

How do you grade Ethiopian coffee?

Ethiopian coffee is graded using a unique, origin-specific system that combines physical inspection with sensory evaluation. Coffees are classified into quality tiers, typically ranging from Grade 1 to Grade 5, based on the number of defects found in a 300g sample and the results of a formal cupping session, which assesses the coffee's flavor profile and overall quality.

COFFEE GRADINGSpecialty coffeeCupping
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COFFEE GRADINGAnswer

How to conduct a physical quality report for coffee?

Conducting a physical quality report involves a systematic bean inspection to perform a defect analysis and verify quality control standards. The process requires weighing a 350g sample, identifying and categorizing defects according to industry protocols, and documenting the results. This objective assessment ensures the coffee meets the required grade specifications before it is approved for roasting or export.

COFFEE GRADINGSpecialty coffeeRoasting
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COFFEE GRADINGAnswer

What is a 'clean cup' in grading?

A 'clean cup' in sensory grading refers to a coffee that is free of any negative flavor attributes or off-flavors. During cupping, a clean cup displays a clear, consistent flavor profile without interference from defects like fermentation, mold, or chemical notes. It is a fundamental requirement for high-scoring specialty coffee, ensuring the inherent characteristics of the bean are fully expressed.

COFFEE GRADINGCuppingSpecialty coffee
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COFFEE GRADINGAnswer

How does the 'husk' affect coffee bean grading?

The 'husk' or parchment layer, if left on the bean during processing, is considered a defect in coffee grading. It indicates limitations in milling or preparation, which can lead to uneven roasting and inconsistent flavor. In most grading systems, the presence of husk requires a specific defect count, as it negatively impacts the physical appearance and quality control of the green coffee.

COFFEE GRADINGSpecialty coffeeRoasting
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