Cashmere Test Report Checklist: How B2B Buyers Verify Fiber Claims

Start with a claim that can be tested

“Cashmere” is not a quality grade, a hand-feel description, or a substitute for a fiber-content declaration. For a buyer developing a private-label knitwear range, it should be treated as a claim that needs to match a product specification, a batch record, and—where the commercial risk warrants it—an independent test result.

That distinction matters most when a sample becomes a production order. A beautifully soft swatch can help to approve color and handle, but it does not on its own establish composition, fiber-diameter distribution, or whether a later bulk lot matches the approved standard. Build the verification process into the purchase specification before sampling, rather than trying to reconstruct it after goods are packed.

For U.S.-bound wool products, the Federal Trade Commission explains that the name cashmere is reserved for the fine, dehaired undercoat fiber of the cashmere goat. Its guidance also describes a 19-micron limit for average cashmere fiber diameter, a limit on fibers above 30 microns, and a maximum coefficient of variation around the mean of 24%. These are labeling-definition requirements—not a universal luxury ranking system—so buyers should not turn a single micron number into a shortcut for every performance or price decision. 1

Buyer principle: Match every marketing or label claim to a defined specification, a document owner, and a batch or style reference.

The cashmere test-report checklist

Request documents in layers. The exact package varies by product, market, and contract, but the following checklist creates a practical starting point for raw fiber, yarn, and finished-garment sourcing.

Checkpoint	What to request	What it helps establish	Practical buyer question
Commercial specification	Signed product specification with composition, yarn count, gauge, weight, color, tolerances, and care-label wording	The standard against which production is approved	“Which approved sample and revision does this bulk lot follow?”
Fiber identity and content	Independent lab report or agreed testing plan for composition and, where appropriate, cashmere identification	Whether the commercial claim is supported by testing	“Does the report identify both the method and the tested sample?”
Diameter data	Average fiber diameter plus variation data, if fiber fineness is part of the contract	Consistency with the agreed raw-material specification	“Is this a lot-specific result or a general capability statement?”
Lot traceability	Lot number, supplier/buying-station records, dehairing or spinning batch references, and material movement record	Whether the documents relate to the actual goods	“Can the mill link this cone, fabric roll, or garment lot to its source material?”
Finished-product controls	Measurement chart, shade approval, appearance/defect standard, and final-inspection record	Whether the finished item meets the approved production specification	“Who signs the release before shipment, and what is the rework path?”
Claim and label review	Artwork or label proof showing fiber percentages, origin statement, care instructions, and responsible business identity as required by the destination market	That consumer-facing claims match the approved composition	“Has the label been checked for the destination market before printing?”

This is a sourcing checklist, not a substitute for market-specific legal advice or a laboratory method selection. For a U.S. program, the FTC notes that importers and sellers remain responsible for accurate labels and that periodic testing by a qualified independent laboratory is the best way to help assure fiber-content accuracy. 1

Read the test method before comparing a number

An average micron result is only useful when the buyer knows what was sampled and how it was measured. ASTM D2130-22 describes a microprojection procedure for determining average fiber diameter and diameter variation for wool and other animal fibers, including cashmere, and states that the method is suitable for acceptance testing of commercial shipments when the parties use comparable sampling and testing. 2

The report should therefore be read as a chain rather than an isolated value:

1. Sample identity. Confirm the laboratory sample ID, lot number, material form, date received, and any sealing or chain-of-custody information. A result from a development lot cannot automatically be carried over to every future production batch.
2. Method and scope. Ask whether the report measures diameter, fiber identity, quantitative composition, or more than one property. One test does not necessarily answer every question.
3. Result and variation. Record the reported average together with the measure of variation used by the laboratory. Variation has commercial meaning because it affects how consistently a specification can be met.
4. Decision rule. State in the purchase order what happens when the result is outside tolerance: hold for review, re-test an agreed retained sample, downgrade, rework, or reject. Do not leave the consequence to a post-shipment negotiation.

The FTC further notes that trained experts can distinguish cashmere from sheep’s wool by optical or electron microscopy following AATCC or ASTM procedures, and that diameter alone is not the complete distinction because some sheep produce very fine fibers as well. 1 This is why a supplier’s verbal “micron grade” is not a complete identity test.

Separate fiber data from product performance

Fiber fineness, length, spinning construction, knit gauge, finishing, garment weight, dyeing, and use conditions all contribute to the garment a customer receives. A lower reported average fiber diameter may support a particular raw-material specification, but it does not automatically guarantee less pilling, better recovery, warmer wear, or a higher retail position.

For product development, translate a fiber requirement into an end-product brief. A good brief may specify the composition declaration, target yarn construction, gauge, garment weight, dimensional tolerances, pilling-test requirement where commercially relevant, approved hand-feel reference, and wash/care pathway. The corresponding factory release should then tie the finished style back to the approved sample and raw-material lot records.

Buyers comparing yarn should also ask for the commercial unit and processing stage. A test result on dehaired fiber, a yarn technical sheet, and a finished-sweater test report are related documents, but they are not interchangeable. See the site’s cashmere grades guide for a buyer-oriented starting point on fiber descriptors, then ask the supplier to define the actual tolerance and test plan in the specification.

Treat sustainability and traceability claims as evidence requests

Responsible-sourcing language should be as specific as a composition claim. It is more useful to ask “which standard, which scope, which site, which certificate period, and which transaction records?” than to accept broad language such as “eco-friendly” or “fully traceable.”

Two industry reference points illustrate why scope matters. The Good Cashmere Standard describes an independent standard intended to address goat welfare, herders’ working conditions, and environmental protection, with independent audits at farms and production sites. 3 The Sustainable Fibre Alliance’s Animal Fibre Standard identifies five principles: animal welfare, biodiversity and responsible land use, decent work, fiber-quality improvement, and an effective management system. 4

Neither reference means that every cashmere supplier or every lot is certified. A buyer should only make a certification-related product claim after checking the certificate holder, scope, validity, material flow, and any applicable transaction documentation. If certification is not part of the program, the supplier can still document traceability through lot records, processing records, and an agreed audit or disclosure process; the claim should describe exactly that evidence and no more.

Build the review into three purchase gates

The most workable process is not to demand every document at the end. Instead, place the right review at three points in the buying cycle.

Purchase gate	Buyer approval focus	Documents to retain
Before sampling	Commercial intent and product definition	Technical pack, target composition, intended market, test-plan request, sample brief
Before bulk production	Material choice and claim readiness	Approved sample, bill of materials, lot references, lab-plan agreement, label proof
Before shipment	Conformity of finished goods and shipment documents	Final inspection record, packing list, final label artwork, lot traceability file, any agreed test reports

This sequence reduces a common B2B failure mode: approving samples for appearance while leaving fiber verification, label copy, and responsibility for non-conforming results undecided until the delivery window is already closing.

Questions to send with a quotation request

Use precise questions that a factory, yarn spinner, or trading partner can answer in writing:

• What is the proposed composition, and what evidence supports it for the production lot?
• Which material lot or yarn lot will be used for the sample, and how will bulk lots be identified?
• Which test methods are proposed for composition, fiber identity, or diameter if the contract requires them?
• Does the quoted price include the agreed test plan, retained samples, and a final inspection record?
• Which destination-market labels are the buyer responsible for approving, and when is artwork locked?
• If a result falls outside the written tolerance, what re-test, rework, credit, or rejection process applies?

For an RFQ that starts from raw fiber or top, visit Cashmere Raw Material. For yarn construction and material discussions, use the Cashmere Yarn Product Records. For an apparel technical pack, label review, and production sequence, begin with Cashmere Garment OEM/ODM.

Final takeaway

The strongest cashmere claim is not the broadest one; it is the one a buyer can trace from product specification to batch record and, when needed, to an appropriate independent test. Ask for documents early, identify the exact sample each document represents, and agree the acceptance rule before bulk production begins. This produces a cleaner audit trail for the buyer, clearer instructions for the factory, and more credible product information for the eventual customer.

If you are preparing a cashmere RFQ, contact our B2B team with the product category, target composition, destination market, expected quantity, and required test or documentation package. We can use that brief to structure the sampling and production documentation discussion before a quote is finalized.

References

1. U.S. Federal Trade Commission, Cachet of Cashmere: Complying with the Wool Products Labeling Act.
2. ASTM International, D2130-22: Standard Test Method for Diameter of Wool and Other Animal Fibers by Microprojection.
3. Aid by Trade Foundation, The Good Cashmere Standard.
4. Sustainable Fibre Alliance, The SFA Animal Fibre Standard.