1 / 5 Specify
Agree what counts as a match.
The buyer approves the reference sample, the tolerances and the test method before production.
- What the buyer sees
- A versioned specification and an approved sample.
Know what
ships.
Buyer-side chemical sourcing from India. We qualify suppliers and check production batches against your approved specification.
Illustrative lots. Readings are computed from the colours shown.
Follow a shipment.
An illustrative textile order, from approved shade to the buyer’s decision.
2 / 5 Qualify
Check who can make it.
Nython verifies the manufacturer’s process, equipment and testing capability against the requirement.
- What the buyer sees
- A supplier qualification assessment.
3 / 5 Trace
Tie the result to the lot.
The production lot, its tested sample and the test report must refer to the same lot.
- What the buyer sees
- Matching lot references on the sample and test record.
4 / 5 Review
Hold the lot when evidence falls short.
In this example a result needs a repeat test. The reviewer checks the new evidence before advising the buyer.
- What the buyer sees
- A hold, the reason and the follow-up test.
5 / 5 Decide
The buyer decides what ships.
The buyer uses the reviewed evidence to decide whether to release the lot or keep it on hold.
- What the buyer sees
- A documented buyer decision.
Illustrative example. Images are AI-generated.
When the batch shifts.
Watch the production lot take up dye, then change dye strength, pH and temperature to see how far it drifts from the approved shade.
Lab dip checkD65 daylight
StandardBuyer approved
BatchProduction lot
ΔE CMC (2:1)
2.70
Lighter · Duller
Outside tolerance, batch on holdA named reviewer signs the assessment.
Your technical reviewer signs and dates the assessment. You decide whether to release the lot. Nython collaborates with manufacturers across India, China, Vietnam, Indonesia and Sri Lanka.
Explore the materials we check.
Paper dyes
Direct, basic and acid dyes and brighteners for paper, held to the strength and shade you approved.
Read about paper dyes →
Food colours
Synthetic colours, lakes and natural colours, each lot checked against the purity standard of the market it ships to.
Read about food colours →
Agriculture and fertilizers
Sulphate of potash, SSP, zincated and boronated SSP, NPK and water soluble fertilizers, checked lot by lot.
Read about agriculture →Material images are AI-generated illustrations.
Nine stages from requirement to release.
Every stage has a named owner. The final release decision stays with the buyer.
Define the requirement
- 01Nython
Requirement
Buyer submits a spec, a performance target, or a problem with no existing product.
- 02Nython
Technical Development
Nython analyses the requirement and develops or adapts the formulation/process with a manufacturer.
- 03Nython
Supplier Qualification
The manufacturer is technically verified: plant, lab, QC capability, not just claims.
Trial, approve and produce
- 04Nython
Trial
Lab or pilot batch produced, tested, and refined against the requirement.
- 05Nython
Approved Specification
Buyer signs off on a final, versioned specification before commercial production.
- 06BatchGate
Production
Commercial batch is manufactured against the approved specification.
Verify and decide on release
- 07BatchGate
BatchGate Verification
Sample, test, COA, and QA sign-off are tied together through the 8-gate release record.
- 08Nython
Technical Release Review
Nython reviews the evidence for whether the production result makes technical sense.
- 09Buyer
Buyer Release
The buyer makes the final commercial release decision.
What a buyer knows, with and without the chain.
| Question | Without the evidence chain | With Nython + BatchGate |
|---|---|---|
| Manufacturer identity | Claimed | Qualified on-site |
| Sample match | Assumed | Recorded chain of custody |
| Test result | Supplier-reported | Evidenced against a versioned specification |
| Release decision | You, on trust | You, on reviewed evidence |
The software behind the checks.
Nython built and operates BatchGate and DyeLogic for different points in production.
One record from specification to dispatch.
Eight release gates connect the specification, sample, test and sign-off in the same evidence record.
Explore Release Assurance
Approved recipes on the dyehouse floor.
Calculate stock solution, salt and alkali from your own rules. Record the reference version and approvals, then issue a fixed production instruction.
Visit DyeLogicHow we protect the review.
Hold Is Final
A hold stays in place until the reviewer who issued it clears it.
Disclosed Interests
Where Nython also supplies the chemistry being evaluated, that’s disclosed before the work starts.
Named & Dated
Every deliverable carries the reviewer’s name and the date.