Indian Coffee Grading Standards: Commercial, Premium, and Specialty Grades

India is among the world’s top coffee-producing and exporting nations, shipping green beans to over 40 countries. But what makes Indian coffee stand out internationally isn’t just where it’s grown – it’s how it’s graded. Every batch of Indian green coffee goes through a structured grading and garbling process that determines its market value, export eligibility, and end use. Understanding this system is essential for anyone involved in coffee processing, trade, or agribusiness.

The basis of Indian coffee grading 🔗

Indian green coffee is graded primarily on two parameters: bean size (measured by sieve or screen size) and the percentage of imperfections or defects present in a batch. In the Indian grading system, tolerance levels for each grade are specified and expressed as a percentage by weight, and all grades must be completely free from foreign and extraneous matter.

Beans are passed through a series of sieves with holes measured in millimetres (or in 64ths of an inch). Larger beans that are retained on higher-numbered screens receive higher grades. The process of sorting out defective or substandard beans from a lot is called garbling. Grading assigns a label to a coffee lot, while garbling physically separates the poor-quality beans from the acceptable ones – a distinction that matters a great deal in the curing and export process.

Indian coffees are broadly categorised into four tiers: commercial grades (25 grades), premium grades (10 grades), specialty grades (7 grades), and miscellaneous grades (2 grades). Each tier reflects a different level of size uniformity, defect tolerance, and garbling standard.

Processing terminology: plantation, parchment, and cherry 🔗

Before going into individual grades, it helps to understand India’s unique processing nomenclature. Washed Arabica beans are called “Plantation” coffee in India, while washed Robusta beans are called “Parchment.” Both Arabica and Robusta beans that are naturally or dry-processed are referred to as “Cherry.” These terms describe the method by which beans are processed at the estate level, not the type of farm or fruit.

Within each processing category, beans are further separated into grades like AA, A, PB (Peaberry), AB, B, C, BBB, and Bulk – each defined by the sieve size the beans must pass through and the defect tolerances allowed.

Commercial grades for Arabica (Plantation coffees) 🔗

Washed Arabica, marketed as Plantation coffee, is graded along a clear size hierarchy. The Plantation AA grade requires at least 90% of beans to be retained on a 7.10 mm (screen 18) sieve, with 100% retention at 6.65 mm (screen 17). It is clean garbled with a tolerance of up to 2% peaberries.

Plantation A is among the most commonly traded Indian grades in global markets. It corresponds to washed Arabica at screen 17, offering a balanced and versatile cup that appeals to roasters in Europe, the Middle East, and Asia. Plantation B and Plantation C represent progressively smaller beans with greater defect allowances, generally used in commercial blends.

Among Arabica grades, Plantation PB (Peaberry) holds a special position. A peaberry forms when only one seed develops inside the coffee cherry instead of the usual two, resulting in a small, round, dense bean. These rounder beans roast more evenly and are known for delivering an intense flavour profile. The Plantation PB Bold grade requires all beans to be retained on a 4.75 mm oblong sieve.

Commercial grades for Robusta (Parchment and Cherry coffees) 🔗

Robusta, which constitutes the majority of Indian coffee output, is graded under the “Parchment” label when washed and “Cherry” when naturally processed. The grading follows the same size-first logic as Arabica but with parameters tailored to Robusta’s naturally denser, more uniform structure.

Parchment A requires 90% of beans to be retained on a 6.65 mm (screen 17) sieve with full retention at 6.00 mm (screen 15), and is clean garbled with a 2% peaberry tolerance. Parchment AB, Parchment B, and Parchment C represent lower-tier grades with smaller sieve requirements and higher acceptable defect percentages. Commercial grade coffees – whether garbled or not – typically allow a 2-3% tolerance for triage and flat beans.

Robusta Cherry grades (AA, A, AB, etc.) follow a parallel structure to Parchment but refer to dry-processed beans. The Robusta Cherry AA grade requires 90% retention on screen 18 (7.10 mm), and is clean garbled with a combined tolerance of up to 2% peaberries and 1% triage.

Premium grades: the middle tier 🔗

Sitting between commercial and specialty grades, the premium tier is defined by stricter garbling standards and tighter defect tolerances. Premium grade coffees go up to screen 18 and must be clean garbled, with a maximum tolerance of 1-2% for triage or flat beans – and some premium lots carry zero tolerance for these defects entirely.

The premium tier includes grades like Plantation AA and select Parchment A lots where the grower applies consistent quality control throughout picking and processing. Premium grades represent a significant portion of India’s export portfolio, particularly for buyers in Italy and Germany who require high-quality Robusta for espresso blends.

Specialty grades: the top of Indian coffee quality 🔗

India has developed several specialty grades that are unique to the country and are recognised internationally for their distinct cup profiles and rigorous quality requirements. Specialty grade coffees reach up to screen 19 and must be entirely free from flats, triage, and extraneous matter, with a well-polished appearance.

Mysore Nuggets Extra Bold (MNEB) 🔗

Mysore Nuggets Extra Bold is the highest grade of washed Arabica in India, introduced in 1992. These beans must be at least 90% retained on a 7.50 mm (screen 19) sieve, and 100% retained at 6.65 mm (screen 17). The grade permits absolutely no peaberries, black beans, bits, or extraneous matter, with a moisture content specified at 9-10.5%.

The beans are characteristically large, dense, and bluish-green in appearance. In the cup, MNEB is known for full aroma, medium to good body, fair acidity, and a subtle spiciness. Because the beans are uniform in size, they produce a more even roast and a smoother, mellower cup than other Indian coffees. MNEB is primarily sourced from high-altitude growing regions in Karnataka and is regarded as the benchmark for Indian Arabica quality in export markets.

Robusta Kaapi Royale (RKR) 🔗

Robusta Kaapi Royale is the Robusta equivalent of Mysore Nuggets and represents a significant achievement in Indian coffee quality development. It was introduced in 1993 by the Coffee Board of India, which developed it by re-grading Washed Robusta Parchment-AB and isolating beans at screen 17 and above.

The sieve specification for RKR requires at least 90% retention at 6.7 mm (screen 17) and full 100% retention at 6.0 mm (screen 15). Like MNEB, this grade tolerates zero defects. The uniform bean size ensures even roasting and delivers the softest cup profile found among Robusta coffees globally.

RKR does not carry the rubbery or harsh notes associated with lower Robusta grades. Espresso blends made from RKR are known for producing excellent body and crema without the off-flavours typical of commercial Robusta, making it highly sought after by specialty roasters and Italian espresso producers. India’s Robusta Kaapi Royale is often cited as a prime example of what premium washed Robusta can achieve.

Single-estate Plantation A as specialty coffee 🔗

While Plantation A is technically a commercial grade, it can qualify for specialty status under specific conditions. This requires growers to not only cultivate under the right conditions but also segregate beans by cultivar – such as S795, Selection 9, or Cauvery – throughout picking, sorting, and processing. When beans from different cultivars are blended together, the distinct characteristics of each are diluted, resulting in commercial-grade rather than specialty-grade coffee. Single-estate, single-cultivar Plantation A preserves varietal identity and commands premium prices in niche markets.

Garbling: the quality-assurance step behind every grade 🔗

Garbling is the physical process that makes any grading standard meaningful. In the Indian grading system, defect levels are expressed by weight on a 100g sample. A “clean garbled” designation means the lot has been sorted to stringent standards and is completely free from defective beans.

Defects removed during garbling include broken beans, black or sour beans, insect-damaged beans, under-developed beans, stones, and other extraneous matter. The higher the grade, the lower the permissible defect percentage – going from a few percent tolerance in commercial grades to absolute zero tolerance in specialty grades like MNEB and RKR. Manual garbling remains common in Indian curing works and is supported by colour-sorting technology for higher-volume operations.

Why grading standards matter for export and trade 🔗

India’s structured grading system is not just an internal quality measure – it is the language of international coffee trade. When a buyer in Europe orders “Plantation A” or “Robusta Kaapi Royale,” they know precisely what sieve retention, defect tolerance, and garbling status to expect. Green coffee is graded and classified for export with the primary aim of producing the best cup quality and securing the highest possible price. Without a standardised system, buyers cannot make informed purchasing decisions or guarantee consistency in their roasts and blends.

The grading system also incentivises quality at the farm level. Growers who invest in careful hand-picking, proper fermentation, and rigorous sorting can command significantly higher prices by qualifying their lots for premium or specialty grades. This creates a direct economic link between post-harvest management quality and farm-gate profitability – a critical consideration for sustainable coffee production in India.

What do you think? Given that India produces some of the world’s finest specialty Robusta, do you think Robusta Kaapi Royale deserves greater recognition alongside single-origin Arabica coffees in the global specialty market? And how might stricter grading enforcement at the farm level – rather than only at the curing works – change the quality and traceability of Indian green coffee exports?

References

1. https://coffeeboard.gov.in
2. https://www.mkcfoodproducts.com/classification-of-indian-coffee.php
3. https://www.malgudidays.com.au/blogs/news/how-are-coffees-graded-in-india
4. https://josuma.com/traditional-grades/
5. https://jollymaccoffee.com/pages/grading-and-classification-of-green-coffee
6. https://www.westendcoffee.co/2024/08/13/understanding-the-traditional-grades-of-indian-coffee/
7. https://josuma.com/specialty-grades/
8. https://specialtycoffee.id/articles/green-coffee-grading-what-is-aa-grade/
9. https://drwakefield.com/news-and-views/intro-to-grading-and-terminology/