Processing, Explained
From washed, natural and honey through monsooning to anaerobic and carbonic maceration, and how India's processing mix is shifting.
7 parts · about 1.5 hours of reading · Updated Sep 2026
Start with Part 1Who it's for
You've seen washed, natural or anaerobic on a bag and want to know what each one changes in the cup.
Why read it in order
The series moves from the three standard methods to the experimental ones, and each later process is easier to follow once the basics are in place. By the end, a process label tells you what to expect in the cup before you open the bag.
What you'll learn
- Explain how washed, natural and honey processing differ, step by step
- Understand fermentation as the variable underneath every process
- Know what monsooning is and why it exists only on India's west coast
- Judge experimental lots such as anaerobic and carbonic maceration on their merits
- Read how India's processing mix is shifting
In this series
- 01
Washed vs Natural vs Honey: What Processing Means for Flavor
Coffee bags list 'washed' or 'natural' processing, but what do these terms actually mean for flavor? Processing method—how the fruit is removed from the seed—creates more flavor variation than origin alone. Here's what each method does, and what ICB's data shows about Indian coffees.
11 min read
- 02
How Fermentation Shapes Coffee Flavour
Every coffee ferments — the variable is how. Understanding the microbial chemistry behind washed, natural, and anaerobic processing explains why the same estate can produce a clean chocolate cup and a grape-forward lot from the same harvest. This article maps the mechanism to the label, with data from ICB's catalog of 1,238 Indian coffees.
12 min read
- 03
Honey Process Coffee in India: What the Colour Labels Actually Tell You
Honey process removes the cherry skin but leaves the sticky mucilage layer on the bean during drying. The colour label — yellow, red, black — indicates how much mucilage stayed on and how long it dried, which shapes sweetness, body, and fruit intensity. India's specialty estates have produced 81 honey-process coffees across 42 roasters, making it one of the more widely available processing categories in the Indian catalog.
8 min read
- 04
What is Monsooned Malabar Coffee?
Monsooned Malabar is not a roast level or a variety — it is a post-harvest processing method applied to green beans on India's Malabar Coast. The process originated as a colonial shipping accident and has been deliberately replicated since the 19th century. It produces a distinct flavor profile: near-zero acidity, heavy body, and earthy, nutty, spiced character unlike any other Indian coffee.
12 min read
- 05
Anaerobic and Experimental Processing in Indian Coffee
One in five coffees in ICB's catalog now carries an experimental process tag. This is a reference guide to the four categories (anaerobic, carbonic maceration, double fermented, and experimental), covering how each works at the fermentation level, which Indian estates and regions produce them, and what the catalog data says about their flavor patterns.
13 min read
- 06
Carbonic Maceration in Coffee, Explained
Carbonic maceration is the most widely misused term in Indian specialty coffee. It is a specific sub-type of anaerobic fermentation, not a synonym for it, and the distinction shows up in the cup. This field guide maps what CM is, where it happens in India, and what to expect from the 28 Indian coffees that carry the label.
12 min read
- 07
How India's Coffee Processing Mix Is Changing
At commodity volume, Indian arabica has been wet-processed for over a century. The specialty roaster catalog shows something different: experimental methods now represent more than 20% of labeled coffees in a directory of 1,240 entries, up from roughly 7–8% in an earlier snapshot. This is a field guide to the two-track processing shift: what the data shows, where it is happening, and what drives the divergence between the commodity baseline and the specialty catalog.
12 min read
