Washed coffee has pulp and mucilage removed before the beans dry in parchment; hulling removes the dried parchment. CQI teaches processing within its PHP classes and certificate courses, but its current list does not establish a separate “Q Processing – Washed Certificate.” Start with the sequence and worked record below, then compare the documented course routes.
What the washed certificate name actually covers
Washed processing is taught within CQI’s PHP program. The current course progression does not list the standalone award in this page’s old label.
CQI offers introductory and specialist non-certificate classes, the Generalist certificate, Arabica and Canephora Professional courses, and the invitation-only Expert course. Check the exact course and award with CQI before enrolling.
- Non-certificate classes cover introductory and specialist processing topics at different levels.
- Generalist: 200-level certificate course, available in person or live online.
- Professional: 300-level field courses for Arabica or Canephora.
- Expert: 400-level course with selective admission.
Sources: Course Progression (CQI education) — Processing course levels list; Post-Harvest Processing Courses (coffeeinstitute.org) — Course descriptions, 100–400 level; Post-Harvest Processing Program Guidebook V.092025 — Courses, requirements, retakes, and certification sections
The washed sequence: which fruit layer goes, and when
Pulping removes pulp; mucilage removal and washing prepare parchment coffee for drying; hulling removes the dried parchment.
The pulp includes the fruit skin and much of the flesh beneath it. Mucilage lies between pulp and parchment; some usually remains after pulping. Parchment is the covering around the seed, while silverskin is the bean’s own coat.
In the wet process, pulping removes the pulp and as much mucilage as possible by mechanical means. Some mucilage usually stays stuck to the parchment, and that residue is what the next two stages deal with.
Fermentation is the treatment that digests the mucilage adhering to the parchment, allowing its elimination by washing. A mechanical demucilager is the alternative: it removes mucilage by friction instead. Washing then removes all traces of mucilage from the parchment surface with water. At this point you have parchment coffee — the mucilage is gone, but the parchment is still on.
After the parchment coffee dries, hulling removes the dried endocarp to produce green coffee. Washing and hulling therefore act on different materials at different stages. Use the course’s operating instructions for drying and storage; these definitions do not supply process settings.
Where washed and natural processing differ
Compare what is removed before drying and what remains around the seed.
The dry route dries whole cherries before removing the husk. The washed route removes pulp and mucilage before drying the beans in parchment, which is later hulled. Codex also describes a semi-washed route in which pulped beans dry with mucilage remaining.
Sunlight or machines may be used for drying; the equipment alone does not identify the processing route.
| Stage | Wet (washed) route | Dry (natural) route |
|---|---|---|
| After harvest | Pulping in water removes the pulp | Whole cherry dried intact; no pulping |
| Mucilage | Digested by fermentation, then removed by washing; or removed mechanically | Stays inside the drying fruit |
| Dried product | Parchment coffee, then hulled | Husk coffee, then dehusked |
| Final step before green coffee | Hulling removes the dried parchment (endocarp) | Dehusking removes the dried pericarp (husk) |
Practice task: classify a lot from its record
The task below is a paper exercise built entirely on the standard definitions, so no mill visit or equipment is needed.
The assumptions: take each line of the record at face value, and classify the lot using the definitions of pulping, fermentation, washing, drying, and hulling given earlier in this guide. No moisture values, durations, or equipment details are needed.
Practice task
A fictional record says: (1) cherries received; (2) pulped; (3) fermented; (4) dried as parchment coffee; (5) hulled. No mucilage-removal result or washing step is documented. (a) What does pulping remove and what may remain? (b) What does the stated fermentation prepare for? (c) What information must you request before classifying the lot as fully washed? (d) What does hulling remove?
Show the answer
(a) Pulp is removed; parchment and some mucilage may remain. (b) In the described route, fermentation digests mucilage so it can be removed by washing. (c) Ask whether and how mucilage was removed before drying, including whether washing occurred. The incomplete record does not establish fully washed or semi-washed processing. (d) Hulling removes dried parchment to produce green coffee.
An omitted step is a gap in the record, not proof the operation did not happen. Fermentation alone does not document the subsequent mucilage removal. Confirm the missing operation and the condition of the coffee before drying. The record supports asking a precise question; it does not justify assuming an undocumented route or prescribing a fermentation duration.
CQI's actual processing routes and certificates
The documented routes are the non-certificate classes, the Generalist certificate course, the Arabica and Canephora Professional certificate courses, and the invitation-only Expert course.
Intro to Processing introduces harvesting, pre-cleaning and the five named methods: natural, honey, mechanically demucilaged, fully washed and wet hulled. It is a non-certificate class. Confirm the advertised schedule with the instructor.
The Post-Harvest Processing Generalist is a 200-level certificate course for any coffee professional — roasters, retailers, baristas, importers. Training involves lectures, group activities, and a comparative cupping of processing methods, and competencies are tested through a written exam. In person it runs 2 days, or 3 with translation; the online version spreads the same live content, tastings, and testing over up to 15 days. Students attending fully and achieving at least 75% in the course assessment receive a permanent, one-time certificate with no expiration. There is no prerequisite for this course.
Professional has Arabica and Canephora tracks: six days, or seven with translation, in a producing country during harvest. Certification requires theoretical and practical tests. The guidebook’s overview mentions 75%, but individual tests have different requirements; use the current gradebook rather than assuming one pass mark for every test. Certificates last 36 months and use CQI continuing education for renewal.
The Expert level is invitation-only and open to Professional certificate holders; it combines a remote semester, an 8-day field intensive plus travel, and a capstone project over roughly a year, and yields a permanent certificate.
CQI’s course page and FAQ state that Generalist is a prerequisite for Professional candidates who do not process coffee on a farm annually. The guidebook calls it advised; confirm how the condition applies to you. CQI’s registration minimum is 16, subject to applicable local age rules. Instructors set fees, so request the complete quote.
Generalist allows two retake opportunities within 18 months of the original course; Professional allows two within 24 months. The guidebook lists three years in a separate certificate-expiration column, not as an extended retake window. Confirm your actual dates and eligible retake course with the instructor.
- Generalist: written multiple-choice exam, full participation and at least 75%; permanent certificate.
- Professional: theoretical and practical tests with applicable individual pass requirements; 36-month certificate.
- Generalist Online exam eligibility: attend all modules, complete cuppings and submit forms, and complete the post-course evaluation.
Sources: Post-Harvest Processing Courses (coffeeinstitute.org) — Course descriptions, 100–400 level; Post-Harvest Processing Program Guidebook V.092025 — Courses, requirements, retakes, and certification sections; CQI FAQs — Processing Program section; CQI PHP Guidebook V.092025: retake timeframes and certificate expiration, pages 13–14 — https://database.coffeeinstitute.org/api/s3proxy/get/coffee/files/qzz15xywm1/PHP%20Program%20Guidebook%20V.092025.pdf#page=14
Next steps
Match your background to a documented route, confirm details in CQI's course database, and use the definitions and exercise here as preparation for the vocabulary your course will use.
If you are new to processing, the introductory class is a low-commitment way to meet all five standard methods, including fully washed. If you need a certificate as a roaster, retailer, or barista, the Generalist course — in person or live online — has no prerequisite. If you work with post-harvest processing regularly, check whether the conditional Generalist prerequisite applies to you, then look at the Arabica or Canephora Professional field courses.
Use the record exercise to practise identifying missing evidence. For practical processing, arrange the training and supervision appropriate to the course. Check upcoming courses through the CQI database and confirm details with the instructor.
- Create or access your CQI database profile to see upcoming courses and enroll
- Ask each instructor for a quote covering materials, tastings, assessment, retakes, and travel
- Check grades and certificate status in your profile's Gradebooks tab after any course
Sources: Post-Harvest Processing Program Guidebook V.092025 — Courses, requirements, retakes, and certification sections; CQI FAQs — Processing Program section
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