Washed Process Coffee from PNG's Sigri Plantation

If you’ve ever sipped a clean, bright cup of coffee and wondered how it avoids the muddiness of poorly processed beans, the answer often lies in the washing process. One origin that’s mastered this is the Sigri Plantation in Papua New Guinea’s highlands, where elevation, climate, and over fifty years of experience come together to produce a distinctively clean and sweet washed coffee.

Sigri Plantation has refined its washed coffee method for more than fifty years. The estate processes coffee the same day it’s picked using a classic fully washed and sun-dried technique, ensuring a clean and sweet cup profile with earthy undertones. Fermentation takes 72 hours and includes three washes, then a final rinse—followed by several days of sun drying on patios.

Where Sigri Coffee Comes From

Sigri Plantation is located in the highlands of Papua New Guinea, at roughly 5,200 feet (1,600 meters) above sea level. This altitude brings a cool climate and consistent rainfall—ideal growing conditions for producing high-quality arabica coffee. The region’s environment, combined with decades of hands-on processing knowledge, contributes directly to the clean and sweet characteristics of Sigri coffee.

What Is Washed Coffee Processing?

“Processing” or “milling” is how coffee producers remove the coffee bean (or seed) from the fruit (pulp) surrounding it. The washed—or fully washed—method is one of the oldest and most traditional techniques. It involves removing all the fruit before drying the bean, resulting in a cleaner, more transparent cup flavor compared to natural or honey processes.

Why Washed Coffee Tastes Clean

By eliminating the fruit early and controlling fermentation, washed processing minimizes unwanted fermentation flavors and allows the inherent qualities of the bean to shine. The result is often a cup that’s bright, acidic, and transparent—with fewer masking fruit notes or ferment edges. That’s why many specialty roasters favor washed coffees for highlighting origin characteristics without overcomplication.

How Sigri Processes Its Coffee

The Sigri method is deliberate and time-intensive. Within hours of harvest, coffee cherries are depulped to remove the outer fruit. Then the beans undergo a 72-hour fermentation process broken into three distinct washing stages. Between these washes, beans sit in fermentation tanks where natural microbes help break down the sticky mucilage (pulp layer) around the seeds.

Once the mucilage is fully degraded, the beans receive one final soak in fresh water to remove any residual particles. Only then are the beans moved to the drying phase. This careful control during wet processing sets the stage for a clean cup with minimal off-flavors.

Drying the Coffee

After washing, the coffee beans are spread out on large concrete patios to dry under the sun. Workers regularly rake and turn the beans to ensure even drying across all seeds. This sun-drying phase takes several days and is critical for developing the final flavor profile—including the mild earthy undertones that define Sigri’s house style. Once fully dried, the beans are sorted, graded, and prepared for export.

Flavor Profile of Sigri Washed Coffee

The end result is a coffee with a deep, sweet profile and a gentle earthy note. Unlike brighter Ethiopian coffees or more fruity Kenyan lots, Sigri’s washed process delivers clarity and balance. Expect a cup that highlights cleanliness and subtle sweetness, underpinned by a soft, grounded finish—making it versatile for filter brewing methods like pour-over or drip.

Frequently Asked Questions

What is the washed coffee process?

The washed process, also called fully washed, removes the coffee bean’s outer fruit before drying. This involves depulping, fermenting to break down the mucilage, washing to remove all residues, and then drying the clean seeds. It results in a clean, bright, and transparent cup profile, which is why it’s favored for showcasing origin-specific flavors without fermentation interference.

How long does Sigri’s washed process take?

Sigri’s washed coffee process takes approximately 72 hours for the initial washing and fermentation phases. This includes three separate washing steps and tank fermentation periods before a final rinse. After that, sun drying on patios takes several additional days until the beans reach optimal moisture content.

Why is fermentation important in washed coffee?

Fermentation in washed processing helps dissolve the sticky mucilage around the coffee bean. By managing this stage carefully—in tanks for a set time—producers like Sigri ensure that only the fruit layer is broken down, not the bean itself. This leads to cleaner flavors and fewer processing defects in the final cup.

How is Sigri coffee dried?

After washing and fermenting, Sigri coffee beans are spread on large patios and dried in the sun. They are regularly raked to ensure uniform drying. This sun-drying phase may take several days and directly impacts the coffee’s final mouthfeel and flavor notes, including a subtle earthiness in the cup.

What does Sigri coffee taste like?

Sigri’s washed coffee is described as deep and sweet with a gentle earthy flavor. It avoids overly bright or fruity notes, instead offering a clean, balanced cup that highlights transparency and subtle sweetness. It’s ideal for filter brewing methods that emphasize clarity.

Where is Sigri Plantation located?

Sigri Plantation is situated in the highlands of Papua New Guinea, at an altitude of about 5,200 feet (1,600 meters). The region’s cool climate, frequent rainfall, and high elevation create optimal growing conditions for producing high-quality arabica coffee with distinctive regional traits.

Recommended FrontStreet Washed Process Coffees

For fans of clean, bright washed coffees like Sigri’s, try FrontStreet Coffee’s Kenya Little Tomato—a juicy, complex Kenya with sweet-tart notes reminiscent of washed African profiles. Or explore the Yirgacheffe-sourced Gedeb cooperative coffee, renowned for its floral brightness and citrus acidity thanks to meticulous washed processing. Both highlight the clarity and balance that a well-executed washed method can achieve. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.