• Calm Coffee Roastery coffee bag on a light purple background
  • Coffee farmer Supriyanto and two colleagues
  • Coffee cherries being sorted for quality control
  • Coffee cherries on tree in East Java
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LOW CAF INDONESIA Supriyanto

LOW CAF INDONESIA Supriyanto

£20.00 GBP
£20.00 GBP
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This coffee is our current Low Caf Explorer Subscription coffee - subscribe to save 25%.


On the volcanic slopes of Mount Ijen in East Java, producer Supriyanto cultivates a small plot of a rare Laurina hybrid.

Producer: Supriyanto

Variety: Laurina Hybrid

Process: Natural + Anaerobic Fermentation

Region: East Java

Elevation: 1700m

Harvest: October 2025

Caffeine Level: 0.94% (green coffee)

This coffee was developed through cross-breeding by the Indonesian Coffee and Cocoa Research Institute, allowing the traditionally delicate Laurina variety to grow successfully in Indonesia while expressing a slightly different character - including a little more caffeine than typical for the variety.

After harvest, the cherries undergo an anaerobic natural process. The whole cherries are sealed in tanks for a controlled fermentation before being dried naturally. 

The result is a lively but balanced Lo Caf coffee, with citrus brightness, soft fruit notes and a rounded brown-sugar sweetness. The lighter roast highlights its delicate character and makes it particularly suited to filter brewing.

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What is Lo Caf coffee?

Our Low Caf coffees are rare coffees that naturally contain less caffeine than typical arabica varieties.

Laurina, an ultra low-caffeine arabica variety, usually contains 0.4% to 0.6% caffeine.

Aramosa, a hybrid of arabica and the low-caffeine species Coffea Racemosa, typically ranges from 0.6% to 1.0%.

Excelsa, a rare species of coffee gaining in popularity due to it's climate resilience, typically has caffeine content of 0.8 to 1.0%

For comparison, most arabica coffees contain 1.4% to 1.6%. These low-caffeine plants are harder to grow - since caffeine helps defend against pests - which makes Lo Caf coffees both distinctive and limited in supply.

For our Low Caf coffees we lab test the raw (‘green’) coffee for caffeine content before roasting. Testing is conducted using High Performance Liquid Chromatography (HPLC) – a widely used analytical technique for separating and quantifying compounds in food and drink.

Freshly Roasted

We roast on Tuesdays and Thursdays and dispatch the following day.

Shipping Information

We charge £3.45 for UK shipping using Royal Mail's Tracked 48 Service. Shipping is free for orders of £45 and over.

Recyclable Bags

We have carefully selected our bags to be mono material LDPE 4 and they can be recycled. Local recycling services vary across the UK - for the best chance of success drop the used bags at a recycling point

Our Coffee Commitment

If you are unhappy with your coffee please contact us at hello@calmcoffeeroastery.co.uk and we will try our best to correct the issue.

What our customers say about our Low Caf coffees