Coffee Terminology Glossary: Key Processing & Defect Terms

If you've ever struggled to understand Chinese coffee industry documents or quality reports, you're not alone. Terms like '', '', or '' can make it hard to communicate clearly—whether you're importing beans, assessing quality, or training staff. This guide unpacks the official Chinese coffee standards terminology so you can talk the same language as producers and technicians.

The following glossary includes over 50 key terms drawn from the Chinese coffee industry’s standard index, covering everything from processing steps like '' (dry processing) and '' (fermentation de-mucilage), to defects such as '' (moldy bean), '' (insect-damaged bean), and '' (concave bean). We’ve reorganized them logically so you can quickly find the definition you need.

What Is This Glossary For?

This is a professional reference for coffee professionals working with Chinese-produced or Chinese-standard coffee. It translates technical Chinese terms—often found in lab reports, purchase contracts, and quality control documents—into accurate, usable English. Each entry matches the original Chinese index exactly, preserving the numbering and technical context.

Coffee Processing Methods & Steps

The glossary defines essential coffee processing and preparation stages. Here are some key terms:

• (Dry processing): Coffee processed without water removal of the pulp; also called natural processing.
• (Wet processing): Processing method that uses water to remove the coffee cherry's outer skin and pulp.
• (Fermentation de-mucilage): The step where sticky mucilage is broken down via microbial fermentation before washing.
• (Floating): A density separation process where lighter, defective beans float and are removed.
• (Pulping): Removing the coffee fruit’s outer flesh or pulp.
• (Washing): Cleaning parchment coffee post-fermentation to remove mucilage and debris.
• (Drying): Includes terms like '' (drying of fresh coffee cherries), '' (drying of husked beans), and '' (rehydrated coffee beans).
• (Roasting): The thermal process turning green coffee into roasted coffee; also appears as '' (roasted coffee).
• (Grinding): Reducing roasted coffee into ground form for brewing.

Green Coffee Bean Types & Classifications

The index specifies various types of coffee beans based on processing, appearance, or species:

• (Arabusta coffee): A hybrid coffee type (not Arabica or Robusta).
• (White coffee bean): Underdeveloped or very light-colored beans.
• (Black coffee bean): Dark or over-dark beans, possibly indicating over-roast or defect.
• (Amber bean): Light-colored beans, possibly under-roasted or immature.
• (Elephant bean): Large coffee bean variety, usually Maragogype.
• (Large-bean variety coffee): Refers to typologically larger-seeded coffee cultivars.
• (Small-bean variety coffee): Smaller-seeded coffee varieties, often including Arabica Typica or Bourbon derivatives.
• (Medium-bean variety coffee): Mid-sized coffee seed types.
• (Husked coffee beans): Coffee beans still in their outer husk or hull.
• (Parchment coffee): Coffee beans with their protective parchment layer intact.
• (Single bean): Individual, possibly sorted or unique beans.
• (Half-black bean): Partly blackened beans, often a drying defect.
• (Flat bean): Thin or compressed coffee beans, usually a defect.
• (Concave bean): Coffee beans with dented or sunken surfaces.
• (Blistered bean): Damaged beans with blistered surface appearance.
• (Deformed bean): Irregularly shaped coffee beans.
• (Immature bean): Harvested before full ripeness, typically greenish and underdeveloped.
• (Light-flavored bean): Beans with mild or understated flavor profile.
• (Tall variety coffee): Coffee plants or beans from taller cultivar types.

Defects, Contaminants & Quality Issues

A major portion of the glossary covers defects and unwanted materials found in green coffee:

• (Moldy bean): Beans showing visible mold growth.
• (Insect-damaged bean): Coffee beans damaged by insect boring.
• (Coffee bean with insects): Presence of live or dead insects.
• (Bean with live insects): Active infestation.
• (Bean with dead insects): Remains of dead pests inside or on beans.
• (Foul-smelling bean): Beans emitting offensive odor, usually due to spoilage.
• (Stinky coffee bean): Another term for foul or off-smelling beans.
• (Discolored or blotchy bean): Not explicitly named here, but related issues may fall under visual defects.
• (Shriveled bean): Dehydrated or shriveled beans, often from over-drying or poor health.
• (Charred bean): Coffee beans blackened as if burned or over-roasted.
• (Broken bean / Crushed bean): Term may apply, with '' defined explicitly as broken beans.
• (Broken bean): Physically fractured coffee beans.
• (Sponge bean): Light, porous-looking beans, possibly due to over-drying or fermentation error.
• (Amber bean): May indicate underdevelopment or light roasting.
• (Concave bean): Indentations suggest handling damage or physiological issues.
• (Foreign matter): Non-coffee materials found in a lot, such as stones or plant material.
• (Large stone): Rocks found in dried coffee batches.
• (Medium stone): Mid-sized rocky contaminants.
• (Small stone): Minor rocky impurities.
• (Large clod): Big chunks of dirt or dried soil.
• (Medium clod): Medium-sized soil contamination.
• (Small clod): Small dirt pieces.
• (Large twig): Large pieces of woody stem material.
• (Medium twig): Mid-size branch fragments.
• (Small twig): Small woody debris.
• (Husk fragments): Broken bits of outer coffee cherry husk.

Physical Measurements & Lab Analysis

The index also defines measurement and analytical terms used in green coffee evaluation:

• (Particle size analysis): Assessment of bean size distribution.
• (Sieve residue): Material remaining on a sieve after sifting.
• (Diameter): Physical bean size measurement.
• (Screen grading): Sorting beans by size using screens or sieves.
• (Moisture content): The percentage of water in green coffee, a critical quality metric.
• (Weight loss on heating): Mass lost when beans are heated, often during roasting trials or analysis.
• (Insoluble solids content): Measured residue after certain extractions or processing steps.
• (Caffeine): The primary stimulant compound in coffee, listed here as an analytical reference.
• (Coffee oil): Refers to coffee's natural lipid content.
• (Coffee aroma compounds): Volatile aromatic components defining coffee flavor.

Laboratory & Sampling Procedures

Quality assessment terms used in labs and during sample evaluation include:

• (Sample): A portion taken for testing or evaluation.
• (Mixed sample): A combined sample from multiple sources.
• (Blending): Combining different coffees into a mix.
• (Blended sample): A sample resulting from blending.
• (Base sample): Reference or starting sample for comparison.
• (Bag): Packaging unit, often relevant in sampling context.
• (Box): Container used in storage or transport sampling.
• (Multi-layer sampler): Tool for taking samples from stacked coffee bags.
• (Coffee sampler): Device for collecting green coffee samples.
• (Lab sample): Sample prepared specifically for analytical lab work.
• (Visual inspection): Human visual assessment of beans.
• (Olfactory inspection): Sniff-testing for aroma defects.
• (Screen grading): Size-based sorting using screen sizes (e.g., China-standard No.20 sieve).

Recommended FrontStreet Beans for Processing & Defect Study

Explore FrontStreet Coffee’s single origins to see how processing impacts cup quality. Try the Ethiopia Humbera (Yirgacheffe region, washed process) with notes of jasmine, bergamot, and lemon peel—ideal for studying clean washed profiles. For naturals, the Kenya Little Tomato shows tart berry and tropical fruit flavors, highlighting dry-processing effects. Or taste the Panama Humbera, a washed Geisha with rose, mandarin, and honey complexity. These beans let you examine how processing shapes defects and quality markers. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.