Fabric Test Reports: Martindale, Wyzenbeek and Wash Colorfastness

A fabric report may show a large Martindale number, a smaller Wyzenbeek number and a wash colorfastness grade on the same page. Those results are not competing scores.

Martindale and Wyzenbeek are abrasion methods. Wash colorfastness addresses how colour changes or stains adjacent materials under a specified laundering procedure. A buyer who ranks all three values as “stronger” or “weaker” is combining different questions into one decision.

The useful reading order is: sample identity, test method, test conditions, endpoint, result and intended use. The number comes near the end.

Separate the three questions before comparing results

Report item	Question it answers	What it does not prove
Martindale abrasion	How the submitted specimen behaves under the stated Martindale method and endpoint	A directly equivalent Wyzenbeek result or guaranteed service life
Wyzenbeek abrasion	How an applicable woven specimen behaves under the stated oscillatory-cylinder method	A convertible Martindale score or complete durability prediction
Wash colorfastness	How colour change and staining behave under a specified laundering procedure	Abrasion resistance, shade approval or performance under every consumer wash cycle

These distinctions are not editorial preferences. ISO 12947-2 addresses specimen breakdown under the Martindale method, while ASTM D4157 covers abrasion resistance of woven fabrics using an oscillatory cylinder tester. ISO 105-C06 and AATCC TM61 address colorfastness to laundering under their respective procedures.

Martindale: confirm the part and endpoint

“Tested to Martindale” is incomplete. The ISO 12947 series contains different parts and evaluation approaches. A report should identify the exact part, edition or adopted version, specimen preparation, loading or pressure condition where applicable, inspection intervals and endpoint.

ISO 12947-2 concerns determination of specimen breakdown. Other parts of the series can address mass loss or appearance change. A result based on appearance assessment should not be presented as though it were a breakdown result.

Applicability matters too. ISO states that ISO 12947-2 is not applicable to coated fabrics, including laminated fabrics, when the coated-surface abrasion behaviour is the property being evaluated. A sofa pad with an anti-slip laminate may therefore require a different method or a clearly defined test of the textile face.

Before using the cycle count, ask: which surface was tested, what endpoint was used, and does that endpoint match the failure that matters to the product?

Wyzenbeek: a different apparatus, not a smaller Martindale

ASTM D4157 uses the oscillatory-cylinder method for woven textile fabrics. The official scope also notes that the method may not be usable for some fabric constructions.

The apparatus, motion, abradant, specimen tension, pressure and evaluation procedure differ from Martindale. Construction and finish can change how a fabric responds. Treat each result within its named method; a Martindale value cannot be converted reliably into a Wyzenbeek value for a specification.

ASTM’s own significance guidance is more cautious than many marketing sheets: laboratory abrasion is one of several factors related to wear, results can vary with test conditions and operator or laboratory effects, and the method does not necessarily predict actual performance in a specific end use.

A high cycle count can still be useful comparative evidence. It becomes misleading when the method disappears and the number is promoted as a universal durability rating.

Wash colorfastness: read the procedure behind the grade

Wash colorfastness evaluates resistance to specified laundering conditions. Reports commonly assess colour change in the specimen and staining of adjacent materials, but the exact procedure, detergent system, temperature, mechanical action, bleach condition and number or type of accelerated cycle must be read from the method and report.

ISO 105-C06 includes procedures for domestic or commercial laundering using a reference detergent. AATCC TM61 is an accelerated laundering method with different test options. Neither label means “machine washable under every customer programme.”

Do not copy one universal passing grade into every RFQ. The required result depends on the product colour, fibre composition, print or dye route, care label, adjacent materials, target market and buyer specification. The lab report should state the scale used and the result for both colour change and staining where those evaluations apply.

Colorfastness also does not prove that bulk shade matches the approved sample. The guide to sofa-cover colour approval under showroom lighting separates shade matching, lighting effects and metamerism from laundering performance.

Read the report header before the test table

A technically correct result can still be useless if it belongs to the wrong specimen. Start with the document identity:

laboratory name and report number;
report and test dates;
applicant or client;
product, material and colour description;
sample or lot reference;
condition in which the specimen was submitted;
pages, amendments and authorization status.

Then reconcile that identity with the SKU being quoted. A report for a base fabric may not cover a printed, coated, laminated or differently coloured finished product. A certificate logo or PDF filename is not a scope statement.

The same discipline applies to regulatory and market documents. Use the OEKO-TEX, REACH and FR evidence map to distinguish document type, holder, product scope and target-market relevance.

Read method, conditions and endpoint as one unit

When the report identity matches, work down the result table in this order:

Method code and version. Record the standard, part, date or adopted national version.
Deviations. Check whether the laboratory changed a condition or used a buyer-specific procedure.
Specimen and conditioning. Confirm the tested face, orientation, number of specimens and conditioning information reported.
Test conditions. Read the abradant, load, pressure, laundering option, temperature or other variables relevant to that method.
Endpoint and evaluation. Determine whether the result represents breakdown, appearance change, mass loss, colour change, staining or another criterion.
Result and decision rule. Apply the agreed requirement only after the preceding items match the specification.

Do not silently compare results produced under different conditions. If the difference matters to the buying decision, request aligned testing or treat the reports as separate pieces of evidence.

Why there is no responsible conversion shortcut

Buyers often ask whether a Wyzenbeek cycle equals a fixed number of Martindale cycles. A reliable universal ratio does not exist.

The two methods load and abrade the specimen differently. Yarn structure, pile, floats, density, finishing and direction can change how the same fabric responds. Even results under one method can vary between laboratories if the specimen, equipment, abradant condition or operator evaluation differs.

Use one of three defensible approaches:

compare candidate fabrics under the same specified method and conditions;
evaluate each result against the buyer’s accepted requirement for that method;
run an end-use or product-specific verification when laboratory abrasion alone does not represent the failure risk.

The guide to evaluating performance upholstery fabric suppliers shows how laboratory evidence fits beside construction, process control and intended use.

Do not turn a threshold into a lifetime promise

A buyer may set a minimum abrasion or colorfastness requirement for a project. Passing it means the submitted specimen met the stated decision rule under the stated method. It does not guarantee a number of years in service.

Real sofa-cover performance also depends on seam construction, fit, pilling, snagging, cleaning, UV exposure, backing, user behaviour and the upholstery surface underneath. A high abrasion result cannot compensate for colour bleeding in the intended wash, and a good wash grade cannot compensate for a weak seam or incompatible anti-slip coating.

This is the same claim-scope problem discussed in waterproof versus water-resistant sofa-cover specifications: the test condition and pass criterion must remain attached to the marketing statement.

A report-comparison template for the RFQ

Ask each supplier to return the same fields:

Field	Buyer entry	Supplier or lab evidence
Intended use and care	Residential, hospitality, ecommerce cover, removable/washable, or other defined use	Proposed material and relevant test plan
Exact method	Standard, part, version and any buyer procedure	Report method line and deviations
Specimen scope	Finished fabric, colour, coating, print, laminate or complete product	Matching sample and lot identity
Endpoint	Breakdown, appearance, colour change, staining or another defined criterion	Reported endpoint and result
Acceptance rule	Project-specific minimum or range	Pass/fail statement only when authorized by the specification

When price offers use different test scopes, align the evidence before choosing the cheaper quote. The supplier-quote comparison guide provides the commercial structure for that step.

The final decision rule

Use Martindale to answer a Martindale question. Use Wyzenbeek to answer a Wyzenbeek question. Use laundering colorfastness to answer a laundering color question.

Compare numbers only when the specimen, method, conditions and endpoint are sufficiently aligned for the decision. When they are not aligned, request a relevant retest or keep the results separate.

BOYA can verify available certificates and product test reports for a requested SKU and standard. Testing, scope, method, sample terms and acceptance criteria depend on the selected material and project. Send the SKU, target market and required standard for product-specific confirmation.

Product family: Sofa Pads & Seat Covers

Compare by product form before checking material, size and performance. A fitted slipcover, a draped throw cover and a separate sofa pad solve different fit and merchandising problems.

Sofa Covers & Slipcovers Sofa Throw Covers Sofa Pads & Seat Covers

For wholesale or private-label sourcing, confirm the exact SKU, measurements, quantity, sample terms, MOQ, packaging and production schedule before ordering. Send BOYA your specification.