Reza Nurullah: Indonesia • Purple Honey • Liberica

A bold and expressive Liberica from the volcanic heartland of Central Java, processed by one of Indonesia’s most quietly celebrated fermentation specialists.

At his farm and processing centre, JB Coffee, Reza Nurullah does things differently. Based in Temanggung, Central Java, Reza has quietly become one of Indonesia's most innovative fermentation specialists. Drawing on the wisdom of the world's best winemakers and brewers, he has developed a mastery of yeast fermentation that focuses on managing time and microbial activity to enhance coffee's character, rather than redefine it. 

This coffee is produced from the Liberica species - one of the lesser-celebrated members of the coffee family, but a variety with deep roots across Southeast Asia. Unlike Arabica, Liberica is a distinct species, known for its ability to grow at lower altitudes. This particular lot, grown at 450 to 600 metres above sea level in Kendal, Central Java, represents a considered evolution of what the species can be.

Reza uses his signature ‘Purple Honey’ process for this coffee, combining traditional honey processing with a double-stage fermentation. After selective harvesting, the cherries are depulped while retaining a controlled layer of mucilage, before undergoing two rounds of fermentation. Fermentation is guided by three yeast strains selected for specific roles: modulating sugar metabolism, enhancing ester formation for fruit and floral aromatics, and increasing glycerol production for improved mouthfeel. The coffee is then slow-dried for approximately 20 to 23 days, during which the retained mucilage continues to enhance sweetness and flavour clarity. 

The Coffee

Traceability: Reza Nurullah < JB Coffee < Kendal < Central Java < Indonesia

Process: Purple Honey

Species: Liberica

Tasting Notes: Blueberry, Parma Violets, Lavender

Brew Guide

18g Coffee - 300g Water

50g Bloom for 30s
70g Spiral Pour, 30s Pause
60g Circular Pour, 15s Pause
60g Circular Pour, 15s Pause
60g Circular Pour, Drain

Total Brew Time - 3:00s