Kolaka Sulawesi Robusta Roasted Coffee
The darkest profile we ship, on our highest caffeine green, 1,000 kg per profile and grade.
- Agtron whole bean 36 to 46, the darkest profile we ship
- 2.3 to 2.8% caffeine, the strongest coffee on our list
- Green graded 1 to 6, Grade 1 to 2 for blends, 4a and 4b for volume
- 1 kg valve bags or 10 kg bulk foil for repackers
- Minimum order
- 1,000 kg per roast profile and grade
- Roast level
- Dark, Agtron whole bean 36 to 46
- Moisture
- 2.0 to 3.0% after roast
- Lead time
- 2 to 3 weeks, dispatch within 7 days of roast
- Incoterms
- FOB, CIF, DAP
Tell us your grade, volume, and destination port. We normally reply within one business day.
Lot overview
Kolaka green roasted Agtron whole bean 36 to 46. Caffeine 2.3 to 2.8%. Packed 1 kg valve bags or 10 kg bulk foil on the green grade you contract.
The roast and where it is used
Agtron whole bean 36 to 46 on dense Kolaka green, which is the combination behind a thick persistent crema and a heavy bitter chocolate base. It is specified by espresso blenders who want maximum body from a small percentage of the recipe, usually on Grade 1 or 2, and sold straight into markets that drink robusta strong, black, and sweetened, where 4a and 4b do the job.
Roasting a dense high caffeine green
A dense gravity sorted green at this roast level sits close to the point where the cup turns ashy, so batch profiles are held tightly and each production run is cupped against the retained reference before release. That control is the difference between a deliberate dark roast and a scorched one, and it is why we hold the profile rather than the roast time.
Minimum, formats, and lead time
1,000 kg per roast profile and grade, packed in 1 kg one-way valve bags in 12 kg cartons or 10 kg bulk foil for repackers and grinders, with 12 months unopened shelf life. Lead time is two to three weeks, dispatch within seven days of roast, and recurring buyers hold a monthly schedule against an allocated green contract.
Grades we quote on this robusta
Robusta runs the same SNI 01-2907 defect ladder as arabica, with Grade 4 split into 4a and 4b because that is where most export volume trades. Screen size is contracted separately from grade, so any row below can ship screen 13 up or screen 16 up depending on what your roaster or extraction line is set for.
| Grade | Defect value per 300 g | What buyers use it for |
|---|---|---|
| Grade 1 | 11 maximum | Espresso blends and premium soluble, normally taken screen 16 up |
| Grade 2 | 12 to 25 | Standard espresso and roast and ground blends for retail |
| Grade 3 | 26 to 44 | Volume blends, vending, and three in one mixes |
| Grade 4a | 45 to 60 | Grade 4a: soluble and extract, 45 to 60 defect values |
| Grade 4b | 61 to 80 | Soluble and instant production where yield matters more than cup |
| Grade 5 | 81 to 150 | Liquid coffee extract and low cost instant lines |
| Grade 6 | 151 to 225 | Industrial extraction, caffeine recovery, and non beverage use |
Frequently asked questions
Ordering, samples, shipping, and payment.
Which green grade underpins this dark roast?
Grade 1 and 2 for espresso blenders who want the crema without carrying defect flavours into a recipe, 4a and 4b for straight dark programmes and vending, where the roast level does the covering. Caffeine of 2.3 to 2.8% is the same at every grade, because roasting does not change it. Minimum is 1,000 kg per profile and grade.
How dark is this roast and does it taste burnt?
Agtron whole bean 36 to 42, the darkest profile we ship, and it is held there deliberately rather than pushed further. Dense EK-1 green at this level sits near the point where a cup turns ashy, so every production run is cupped against a retained reference before release.
Does the dark roast reduce the caffeine content?
Caffeine is stable through roasting, so the 2.3 to 2.8% on a dry basis from the Kolaka green carries through. What changes is weight: darker roasts lose more mass, so a dose measured by weight contains marginally more caffeine than the same weight of a light roast, not less.
What is the minimum order for roasted Sulawesi robusta?
1,000 kg per roast profile and grade, in 1 kg valve bags or 10 kg bulk foil, with a two to three week lead time. Recurring buyers hold a monthly production schedule against an allocated green contract so the profile, the grade, and the supply are all locked before the season starts.
Is certified volume available on the roasted product?
Yes, the Kolaka green carries Rainforest Alliance and 4C, and the roastery is included in the chain of custody, so a certified claim can appear on the finished pack. Transaction certificates and Halal (BPJPH) documentation ship with the goods. Certified volume is allocated at the June to October harvest.
What would you like to know?
Choose a question to see the relevant availability, samples, and supply terms.
- Can I request samples?Choose an arabica, robusta, or roast-approval set with the relevant grading data.
- Can you roast coffee to my specification?We develop an agreed Agtron target and roast curve, then record it for repeat production.
- Can I order roasted coffee in bulk?Yes, for horeca, vending, or repacking with an agreed roast profile and pack format.
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