About the Author

Putra Siregar

Putra writes for Indonesia Specialty Coffee — origins, cupping, processing, and the trade behind every cup.

Putra Siregar leads coffee curation and content at Indonesia Specialty Coffee. He writes practical guides on green-coffee handling, roasting and brewing — from diagnosing defects like mold to dialing in espresso — helping roasters and coffee lovers get the most from Indonesian beans.

Role
Head of Sourcing
Articles
177 published
Coverage
Sumatra Sourcing
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Insights & stories

Latest articles by Putra Siregar.

Robusta Temanggung: Guide to Java’s Best-Known Robusta
Articles

Robusta Temanggung: Guide to Java’s Best-Known Robusta

Robusta Temanggung is robusta grown on the volcanic slopes between Mount Sindoro and Mount Sumbing in Central Java, usually at…

27/07/2026Read
Enzymatic Kopi Luwak: How Indonesia Makes Civet Coffee Without the Civet
Articles

Enzymatic Kopi Luwak: How Indonesia Makes Civet Coffee Without the Civet

Enzymatic Kopi Luwak is civet coffee produced without a civet. Indonesian producer Rani Mayasari, working with Prof. Erliza Noor at…

25/07/2026Read
ISOPROCARB Testing for Green Coffee Beans Exported to Japan: What Every Buyer Should Know
Articles

ISOPROCARB Testing for Green Coffee Beans Exported to Japan: What Every Buyer Should Know

When a Japanese importer opens a bag of Indonesian green coffee, they are trusting a promise: that the beans inside…

24/07/2026Read
How to Request and Evaluate Green Coffee Samples Before a Bulk Order
Articles

How to Request and Evaluate Green Coffee Samples Before a Bulk Order

On the cupping table in front of me right now, there are five bowls from the same offer sample. The…

22/07/2026Read
Indonesia vs Ethiopia Coffee: An Honest Comparison from the Cupping Table
Articles

Indonesia vs Ethiopia Coffee: An Honest Comparison from the Cupping Table

Put a washed Yirgacheffe and a wet-hulled Gayo in the same cupping flight, and you will wonder how both are…

20/07/2026Read
Importing Green Coffee to South Korea from Indonesia: Tariffs, FOB vs CIF, and MOQ
Articles

Importing Green Coffee to South Korea from Indonesia: Tariffs, FOB vs CIF, and MOQ

Most people planning their first shipment from Indonesia to South Korea worry about the tariff. It’s the wrong thing to…

14/07/2026Read
LC vs TT: Which Payment Method Should You Use to Import Coffee from Indonesia?
Articles

LC vs TT: Which Payment Method Should You Use to Import Coffee from Indonesia?

When you import coffee from Indonesia, the two payment methods you will be offered are almost always LC (Letter of…

13/07/2026Read
Importing Green Coffee to Australia from Indonesia: Tariffs, FOB vs CIF, and MOQ
Articles

Importing Green Coffee to Australia from Indonesia: Tariffs, FOB vs CIF, and MOQ

Importing green coffee to Australia from Indonesia is straightforward on paper: coffee enters duty-free, and there is no import permit…

10/07/2026Read
How Many Bags of Green Coffee Fit in a 20ft Container? Shipping Math for First-Time Importers
Articles

How Many Bags of Green Coffee Fit in a 20ft Container? Shipping Math for First-Time Importers

A 20ft container holds 275 to 320 bags of green coffee at 60 kg each, which works out to roughly…

09/07/2026Read
Putra Siregar
Profile summary

Putra Siregar

Head of Sourcing · Indonesia Specialty Coffee

Putra Siregar leads coffee curation and content at Indonesia Specialty Coffee. He writes practical guides on green-coffee handling, roasting and brewing — from diagnosing defects like mold to dialing in espresso — helping roasters and coffee lovers get the most from Indonesian…

177
Articles published
2023
Writing since
Jul 2026
Latest article
CuppingOriginsProcessingSourcingSensoryExport
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