What does a Kenya Coffee School cupping lab entail for sensory analysis of Coffee ? Also Compare with Barista Mtaani Kahawa Cupping Lab ;
A cupping lab is a specialized facility for the systematic and standardized evaluation of coffee. Its purpose is to assess coffee quality by examining characteristics such as fragrance, aroma, flavor, acidity, body, and sweetness, and to identify defects. Cupping labs are used by roasters for quality control, green coffee buyers for purchasing decisions, and coffee professionals for training and calibration.
The lab environment ;
A proper cupping lab must be carefully controlled to ensure consistent and accurate evaluations.
- Neutral space: The room should be well-lit and fully enclosed, but also well-ventilated and free from distracting odors, noise, or other sensory stimuli.
- Controlled lighting: For specific tests, the room may need to be darkened. Some labs use red lighting to mask the color of samples and prevent bias during evaluation.
- Convenient layout: The space is arranged for an efficient workflow, with designated tables for cupping, counters for sample preparation, and storage for equipment.
Equipment and supplies
A cupping lab requires precise, standardized equipment to ensure that the ratio of coffee to water and the brewing process are consistent.
- Grinder: A high-quality commercial burr grinder is essential for a consistent, even grind.
- Scales: Accurate digital scales with 0.01g precision are needed to weigh coffee beans and water according to specific standards, such as the Specialty Coffee Association (SCA) or KCS ratio.
- Water heating: The lab requires a reliable way to heat large amounts of water to a precise temperature, typically around 93–96°C (199–205°F).
- Cupping bowls: Standardized, uniform glass or ceramic bowls are used for each coffee sample. The SCA or KCS recommends bowls with a capacity of 200–266 mL.
- Cupping spoons: Deep-bowled, wide spoons are used for skimming the crust and tasting the coffee.
- Spittoons: Receptacles for spitting the tasted coffee are necessary to prevent overcaffeination during a session.
- Timers: Digital timers are used to track the steeping time of the coffee, ensuring consistency.
- Cupping forms and pencils: Standardized forms, such as those from the SCA or KCS, are used to record sensory observations and scores.
- Filtered water: Clean, filtered water with a specific mineral content is used, as water quality significantly impacts the final taste.
The cupping process
A typical cupping session follows a standardized protocol to ensure fair and objective evaluation.
- Preparation: Freshly roasted coffee samples are weighed, ground, and placed in individual bowls.
- Dry fragrance: Cuppers first smell the dry coffee grounds to evaluate their fragrance.
- Wetting the coffee: Hot water is poured over the grounds, and a timer is started.
- Aroma: After about four minutes, the cuppers “break the crust” by pushing a spoon through the grounds and inhale the released aroma.
- Tasting: After the coffee has cooled, cuppers use a special technique to slurp the coffee from the spoon, spreading it across their palate to analyze the flavors.
- Scoring and evaluation: Throughout the process, cuppers note their impressions and score the coffee on various attributes, like flavor, sweetness, acidity, body, and balance.
Benefits of a cupping lab
A dedicated cupping lab provides several benefits for the coffee industry.
- Quality control: It ensures that a roaster’s finished product consistently meets quality standards.
- Purchasing decisions: Buyers and roasters can use cupping to systematically compare and select the best green coffees.
- Communication: It provides a common language for discussing coffee quality among professionals throughout the supply chain.
- Product development: Cupping allows roasters to analyze a coffee’s potential and determine the best roast profiles to highlight its unique characteristics