Sri Lankan Ginger and Turmeric: Specs for Export-Ready Blends
Most Sri Lankan brand owners who want a ginger and turmeric blend on an overseas shelf start the conversation with a recipe ratio. Sixty percent turmeric, twenty percent ginger, the rest carrier and salt. That part is easy. The part that stops the shipment is a set of numbers nobody wrote down: moisture ceiling, acid-insoluble ash, volatile oil floor, aflatoxin limit, and what happens when a buyer’s lab runs a metals screen on a bright orange powder.
Specifying the two rhizomes properly is a different job from formulating with them. A blend can taste right and still fail at a border. This is the specification a Sri Lankan brand owner should be writing before a first commercial run, and the reasoning behind each line of it.
Buyer’s snapshot
- Sri Lanka’s spice and essential oil exports reached US$ 449.9 million in 2025, down 2.59% on the year (Sri Lanka Export Development Board, 2026).
- Curcumin in Sri Lankan turmeric measured 3.51% to 5.05% across samples in one peer-reviewed comparison, so the figure has to be tested per lot, not assumed.
- A spec that only says “meets ASTA” leaves microbiology and colour adulteration uncovered, because the ASTA cleanliness table addresses neither.
- Silk Foods Ceylon (SFC) mills spice at 100 to 200 kg per hour on a BRCGS- and FSSC 22000 V6-audited line in Matale, with a 50 kg first-run minimum on a powdered SKU.
- The parameter table below is the sheet to hand a manufacturer at RFQ stage.
What an export-ready ginger and turmeric spec actually contains
An export-ready specification sheet has four blocks: physico-chemical parameters, cleanliness, contaminants, and microbiology. Each block has its own reference document and its own test method, and a spec that names the parameter without naming the method is only half a spec. A laboratory reporting 11% moisture by one drying method and 11% by another is not reporting the same number.
The physico-chemical block is the one buyers query first, because it drives both yield and shelf life. For dried ginger, the Netherlands-based CBI market intelligence programme, updated in October 2025, lists the working set that European buyers apply: moisture at 12% maximum, volatile oil at a minimum of 1.5 ml per 100 g, total ash at 8% maximum, and acid-insoluble ash at 2% maximum.
| Parameter | Dried ginger (buyer working spec) | Ground turmeric | Reference method to name |
|---|---|---|---|
| Moisture, max | 12% | State your own ceiling and test it | SLS 186 Part 5 |
| Total ash, max | 8% | State your own ceiling and test it | SLS 186 Part 3 |
| Acid-insoluble ash, max | 2% | State your own ceiling and test it | SLS 186 Part 4 |
| Volatile oil, min | 1.5 ml per 100 g | Not the governing parameter | SLS 186 Part 11 |
| Curcumin content, min | Not applicable | Agree a floor per lot | ASTA Method 18.0, 425 nm |
| Degree of fineness | Agree mesh with the blender | Agree mesh with the blender | SLS 186 Part 12 |
| Aflatoxin B1, max | 5.0 µg/kg | 5.0 µg/kg | EU Regulation 2023/915 |
| Total aflatoxins, max | 10.0 µg/kg | 10.0 µg/kg | EU Regulation 2023/915 |
| Ochratoxin A, max | 15 µg/kg | 15 µg/kg | EU Regulation 2023/915 |
| Lead, max | 1.50 mg/kg | 1.50 mg/kg | EU Regulation 2023/915 |
The turmeric column is deliberately open in three rows. Sri Lanka Standards Institution has published SLS 613:2017 for turmeric whole and ground, and SLS 1647:2019 for dried or dehydrated ginger, and those are the documents to cite on a local spec sheet. Their numeric limits sit behind a purchase, so a brand owner writing a spec should either buy the standards from SLSI or agree explicit figures with the manufacturer and record them. Writing “as per SLS 613” without ever reading SLS 613 is how a brand ends up arguing about ash content after a container is packed.
One live change is worth catching. ISO 1003, the international standard for dried ginger, was reissued in 2025. Any specification sheet still referencing the 2008 edition is citing a superseded document, and a technically literate overseas buyer will notice. The turmeric equivalent, ISO 5562, is still on its 1983 first edition with a revision in development, which is a fair argument for leaning on Codex Alimentarius CXS 359-2024 for turmeric and CXS 343-2021 for ginger instead.
Why curcumin percentage has to be tested, not assumed
Curcumin is the parameter most often stated as a marketing claim and least often supported by a test report. It also varies more than the trade assumes.
A 2018 study published in the International Journal of Food Science and Nutrition measured curcumin by spectrophotometry, using ASTA Method 18.0 with absorbance read at 425 nm, across Sri Lankan and Indian turmeric rhizomes. The Sri Lankan samples ranged from 3.51% to 5.05% curcumin. Two Indian samples sat between them at 4.25% and 4.30%. The highest result and the lowest result in the whole study were both Sri Lankan, one from a research institute source and one from a home garden.
That is the finding worth carrying into a spec sheet, and it points the opposite way from the usual origin claim. Sri Lankan turmeric is not reliably higher in curcumin than Indian turmeric. It is reliably variable, which means the number belongs in a specification and a certificate of analysis rather than in a paragraph of copy. Officials at the Department of Export Agriculture, quoted by The Morning in March 2024, put domestic turmeric at generally above 4% curcumin, with a low of 3.5% and Ampara-region material reaching 8.5%. A range that wide across one small country is a sourcing question, not a marketing one.
There is a practical shortcut the same study supports. Curcumin correlated with colour: the 5.05% sample measured L 54.72 and b 46.06, while the 3.51% sample measured L 32.63 and b 31.46. A colorimeter reading is not a substitute for an assay, but it is a fast incoming-goods screen that flags a suspect lot before it reaches the mill. For brand owners going the capsule route rather than the blend route, the same assay logic applies with tighter tolerances, which is covered in more depth in turmeric curcuminoid content for a private-label capsule.
What ASTA cleanliness covers, and the two gaps it leaves
The American Spice Trade Association cleanliness specifications are the shorthand most blend specs reach for, and they are genuinely useful. They are also narrower than the shorthand suggests.
| ASTA cleanliness parameter | Turmeric | Ginger |
|---|---|---|
| Whole dead insects, count | 3 | 4 |
| Mammalian excreta, mg per lb | 5 | 3 |
| Other excreta, mg per lb | 5.0 | 3.0 |
| Mould, % by weight | 3.00 | See note |
| Insect-defiled or infested, % by weight | 2.50 | See note |
| Extraneous or foreign matter, % by weight | 0.50 | 1.00 |
The ginger note matters: ASTA fails a ginger lot where mouldy pieces and insect-infested pieces together exceed 3% by weight, rather than setting the two separately as it does for turmeric.
Now the gaps. ASTA states plainly that its cleanliness specifications do not cover microbiological contamination and do not cover dye adulteration. A blend spec that says “meets ASTA cleanliness” and stops has therefore said nothing about Salmonella and nothing about whether the colour in the powder came from the rhizome.
The microbiology gap can be closed with a water-activity target as well as a plate count, and ASTA publishes the numbers to justify one. The minimum water activity supporting growth is 0.93 to 0.94 for Salmonella, 0.95 for E. coli, and 0.80 for Aspergillus flavus and Aspergillus parasiticus. Specifying a finished-blend water activity comfortably below 0.80 does more preventive work than a microbial limit alone, because it addresses the mould that produces the aflatoxin rather than only measuring the aflatoxin afterwards. It is also a parameter a manufacturer can actually control on the drying and milling line, which a brand owner cannot control at a trader’s warehouse.
Lead chromate: the screen a turmeric spec should name
The colour gap is the more serious one, and it is specific to turmeric.
Research published in Science of the Total Environment in 2024 tested 356 turmeric samples, 180 dried roots and 176 powders, collected from 23 cities across India, Pakistan, Sri Lanka and Nepal between December 2020 and March 2021. Fourteen percent of samples, 51 in total, showed lead above 2 µg/g. The samples at or above 18 µg/g carried a lead-to-chromium molar ratio close to 1 to 1, which is the chemical signature of lead chromate pigment rather than soil contamination. Samples below 15 µg/g with a ratio under 0.8 were consistent with environmental uptake instead.
That distinction is what makes the finding usable in a specification. A lead result on its own tells a buyer there is lead. A lead and chromium result together, with the molar ratio calculated, tells them whether someone added a pigment. The study’s method was X-ray fluorescence screening in triplicate with ICP-MS confirmation on anything with detectable lead, and that is a sensible two-stage protocol to write into an incoming-goods procedure: cheap screening on every lot, expensive confirmation on the flagged ones.
For a Sri Lankan brand owner the point is not that local turmeric is adulterated. The study reports a regional sample set and does not publish a country-level breakdown, so no claim about Sri Lankan material specifically can be drawn from it. The point is that any buyer’s technical team overseas has read the same literature, will screen for it, and will read a spec that anticipates the screen as a sign of a serious supplier. Naming the Pb:Cr ratio check in the spec costs nothing and settles the question before it is asked.
Which EU border rule actually bites a Sri Lankan blend
Here is where a lot of export-readiness planning aims at the wrong target.
Commission Implementing Regulation (EU) 2026/194, published on 29 January 2026, sets the temporary increased-control list for food entering the European Union. Sri Lanka appears in Annex I for dried, roasted, crushed or ground peppers of the genus Capsicum, with aflatoxins as the hazard and 50% of consignments subject to identity and physical checks. That is the highest frequency band in the schedule.
Sri Lanka does not appear on that list under CN heading 0910, which is where ginger, turmeric, curry and other spices sit. Ethiopia does, at 30% for aflatoxins. India does, at 20% for pesticide residues, along with a separate 20% entry for mixed condiments and mixed seasonings. Pakistan is listed for spice mixes at 30% for aflatoxins.
Read those two facts together and the operational conclusion is uncomfortable for a lot of blend formulations. A Sri Lankan ginger and turmeric blend carries no country-specific increased-control burden from its ginger and turmeric. The moment chilli goes into the same formulation, the aflatoxin exposure arrives through the chilli line, at a 50% check rate. Brand owners building a curry-style blend should know which ingredient is bringing the border risk, because it changes what gets tested hardest and what the incoming-goods budget should be weighted toward. The same logic shapes how the incoming-goods protocol is weighted on the base spices covered in specifying coriander, cumin and fennel for an export-ready curry powder spec.
Two further limits in the same regulation belong on any blend spec. The applicable maximum residue level for ethylene oxide is 0.1 mg/kg, which is the limit of quantification, and its use is prohibited. Sudan dyes, defined in the regulation as Sudan 1, 2, 3 and Scarlet Red, must be tested by a method with a limit of quantification below 0.5 mg/kg. Both are sterilisation and colour shortcuts that a brand owner will never see on an invoice and will absolutely see on a rejection notice.
What the spec changes in the manufacturing conversation
A written specification changes the commercial conversation more than most first-time brand owners expect, because it moves the discussion from price per kilo to who carries which risk.
At Silk Foods Ceylon the spice line mills at 100 to 200 kg per hour, and a powdered spice SKU starts at a 50 kg first-run minimum with volume tiers at 500 kg, 1,000 kg and 2,500 kg. Sample dispatch on an existing recipe runs 1 to 2 weeks, and purchase order to dispatch runs 2 to 3 weeks. Where a blend needs formulation work first, which is common when a brand owner is matching a spec sheet rather than a recipe, plan a 6 to 10 week window. SLSI clearance for a retail SKU typically takes 4 to 8 weeks, so a launch calendar wants a 6 to 10 week buffer between quality sign-off and the shelf date.
The specification is what makes those numbers meaningful. Without one, a 50 kg run produces a powder somebody has to judge subjectively. With one, the same run produces a certificate of analysis against agreed parameters, which is the document an overseas buyer’s technical team will actually ask for. Brand owners weighing which certifications sit behind that document will find the reasoning in contract manufacturing certifications in Sri Lanka, and the same specifying discipline applied to other spices in black pepper grades for a private-label spice line and cardamom grading for a private-label spice brand.
One caution on scope. A specification this detailed is worth writing when there is a committed buyer conversation or a genuine export intent behind it. For a brand owner still testing a blend at kiosk scale with no overseas conversation started, a shorter local spec built on the SLS references and an SLSI submission is the proportionate step, and the export parameters can be added when the first serious enquiry arrives. Packaging format decisions can wait as well, though co-packing 50 g and 100 g spice pouches and the domestic shelf economics in private-label curry powder for the Sri Lankan supermarket shelf are the natural next reads once the powder itself is specified.
Frequently asked questions
What curcumin percentage should I specify for Sri Lankan turmeric?
Set a floor rather than a target, and test it. Published measurements on Sri Lankan turmeric ranged from 3.51% to 5.05% curcumin by ASTA Method 18.0 in a 2018 study, and Department of Export Agriculture officials cited a 3.5% low in 2024. A 3.5% minimum with per-lot testing is defensible; a fixed claim without testing is not.
Does Sri Lankan ginger or turmeric face extra EU border checks?
Not currently. Commission Implementing Regulation (EU) 2026/194, published January 2026, lists Sri Lanka under Annex I only for dried and ground Capsicum peppers, at 50% of consignments checked for aflatoxins. Ginger, turmeric and curry under CN heading 0910 carry no Sri Lanka entry, unlike Ethiopia at 30% and India at 20%.
Is an ASTA cleanliness clause enough for an export blend spec?
No. ASTA’s cleanliness specifications cover insect fragments, excreta, mould, insect damage and extraneous matter, and ASTA states they do not cover microbiological contamination or dye adulteration. An export blend spec needs separate microbiological limits, a water-activity target, and a metals screen that reports lead and chromium together.
Can Silk Foods Ceylon manufacture to a spec sheet I already have?
Yes. Silk Foods Ceylon works from a supplied specification as readily as from a recipe, and the spice line runs 100 to 200 kg per hour with a 50 kg first-run minimum on powdered SKUs. Expect 2 to 3 weeks from purchase order to dispatch on a settled formulation, or 6 to 10 weeks where formulation work is needed first.
How Silk Foods Ceylon can help
For brand owners taking a spice blend from recipe to a specification an overseas buyer will accept, Silk Foods Ceylon (SFC) operates a cellular-manufacturing facility in Matale that handles milling, blending, and the certificate-of-analysis work behind a finished SKU. The spice line runs 100 to 200 kg per hour, with a 50 kg first-run minimum per powdered SKU and volume tiers at 500 kg, 1,000 kg and 2,500 kg. Lead times run 2 to 3 weeks from purchase order to dispatch on a settled recipe; where formulation or spec-matching work comes first, plan a 6 to 10 week window. The Matale facility is BRCGS- and FSSC 22000 V6-audited, with USDA Organic and EU Organic available per SKU and SLSI submission support built into a standard contract manufacturing engagement.
To brief a project, email b2b@esilkroute.com.lk or call +94 76 441 0389 / +94 76 918 5744.
Sources
- European Union, Commission Regulation (EU) 2023/915 on maximum levels for certain contaminants in food, 2023. https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32023R0915 (retrieved 7 August 2026)
- European Union, Commission Implementing Regulation (EU) 2026/194 of 28 January 2026, Official Journal, 29 January 2026. http://data.europa.eu/eli/reg_impl/2026/194/oj (retrieved 7 August 2026)
- Sri Lanka Standards Institution, Sri Lanka Standards List of Spices, updated 2021. http://srilankanspices.com/wp-content/uploads/2012/06/SLSI-Standards.pdf (retrieved 7 August 2026)
- American Spice Trade Association, ASTA Cleanliness Specifications Document, Table 1. https://astaspice.org/resources/asta-cleanliness-specifications (retrieved 7 August 2026)
- Madhusankha GDMP, Thilakarathna RCN, Liyanage T, Navaratne SB, “Analysis of curcumin content in Sri Lankan and Indian turmeric rhizomes and investigating its impact on the colour”, International Journal of Food Science and Nutrition, Vol 3(4), 2018. https://www.foodsciencejournal.com/assets/archives/2018/vol3issue4/3-3-45-867.pdf (retrieved 7 August 2026)
- Forsyth JE, Mistree D, Nash E, Angrish M, Luby S, “Evidence of turmeric adulteration with lead chromate across South Asia”, Science of the Total Environment, 2024. https://www.sciencedirect.com/science/article/pii/S0048969724051532 (retrieved 7 August 2026)
- Sri Lanka Export Development Board, “Sri Lanka’s Export Performance Exceeded US$ 17.2 Billion in 2025”, 26 January 2026. https://www.srilankabusiness.com/news/sri-lankas-export-performance-exceeded-us-17.2-billion-in-2025.html (retrieved 7 August 2026)
- CBI, Netherlands Ministry of Foreign Affairs, “Entering the European market for dried ginger”, updated 16 October 2025. https://www.cbi.eu/market-information/spices-herbs/dried-ginger/market-entry (retrieved 7 August 2026)
- Dullewe M, “How safe is Sri Lankan turmeric?”, The Morning, 31 March 2024. https://www.themorning.lk/articles/LMd6rPKaYoZUgzWXY9bJ (retrieved 7 August 2026)
Written by the Silk Foods Ceylon Team. Silk Foods Ceylon (Pvt) Ltd. is a BRCGS- and FSSC 22000 V6-audited contract manufacturer in Matale, Sri Lanka, offering contract manufacturing, private labelling, co-packing, and in-house R&D for local Sri Lankan brand owners, FMCG companies, hotel and restaurant groups, and distributors. To brief a project: b2b@esilkroute.com.lk, +94 76 441 0389, or +94 76 918 5744.