{"id":10837,"date":"2026-10-15T21:39:53","date_gmt":"2026-10-16T05:39:53","guid":{"rendered":"https:\/\/fursone.com\/abrasion-test-basis-jacketing-tweed-apparel-vs-upholstery\/"},"modified":"2026-10-27T11:38:33","modified_gmt":"2026-10-27T19:38:33","slug":"abrasion-test-basis-jacketing-tweed-apparel-vs-upholstery","status":"publish","type":"post","link":"https:\/\/fursone.com\/ru\/abrasion-test-basis-jacketing-tweed-apparel-vs-upholstery\/","title":{"rendered":"Sofa Abrasion Grade on a Coat Spec: What to Ask the Lab"},"content":{"rendered":"

Ask the lab to report abrasion resistance on the apparel basis, not the upholstery basis: ISO 12947-2, Martindale method, garment load (nominal 9 kPa, about 595 g of effective mass on the abrading head), standard wool abradant, endpoint at specimen breakdown, and results written as cycles to breakdown with warp and weft reported separately. A figure copied from an upholstery specification was produced on the same instrument at the heavier 12 kPa load, so it answers a different question and cannot be pasted onto a coat. If the lab can run only one basis, run the apparel version and have the report state in plain words that upholstery Martindale figures are not to be used for acceptance. If your buyer\u2019s QA insists on their number, ask for both bases on one report, each line labelled with the load it was run at.<\/p>\n

Why an Upholstery Abrasion Figure Does Not Travel to a Coat<\/h2>\n

Both numbers come off the same machine. The Martindale method rubs a circular test piece against an abradant under a stated load and counts the cycles until the cloth fails, and the same instrument is used for furniture, workwear, coatings and shirtings. What changes between end uses is the load class, the abradant, the endpoint and the way the result is written down. Readers who want the mechanics of the wear itself can start from the general entry on abrasion<\/a>; what matters in a specification is that a cycle count is a product of those settings, not a property of the cloth standing alone.<\/p>\n

The load class is the setting that moves first, and it is usually the one missing from the figure your buyer sent. The apparel class runs at a nominal 9 kPa, about 595 g of effective mass on the abrading head. The upholstery and heavy technical class runs at 12 kPa, about 795 g. Under the heavier load the abradant presses harder, the yarns fatigue sooner, and the cloth breaks down in fewer cycles. A jacketing tweed that reaches a given count under the garment load will not reach that same count under the furniture load, and a furniture figure carried across to a coat has not been tested the way the coat will wear.<\/p>\n

The endpoint matters as much as the load. Cycles to specimen breakdown, cycles to a fixed agreed count, mass loss in milligrams, and an appearance rating after rubbing are four different outputs. A report that names none of them gives you a number that cannot be repeated, and a number that cannot be repeated cannot settle a claim.<\/p>\n

The machine family matters too. In North America, contract upholstery clauses are often written as Wyzenbeek double rubs under ASTM D4157, a back and forth rub on a different machine with a different abradant. Double rubs and Martindale cycles do not convert, no matter how tidy the spreadsheet looks. If the number in the buyer\u2019s specification was lifted from a furniture clause, find out which machine produced it before arguing about the value.<\/p>\n

One more thing the standard will not do for you. ISO 12947-2 tells the lab how to run the test and how to decide that the cloth has broken down. It does not hand out a pass level for a coat, a jacket or a bag. The level a buyer requires comes from the buyer, from a retailer\u2019s own manual, or from a national furniture performance document that was written for seating. When a QA sheet arrives as a bare number with no method behind it, the first question is not whether the tweed can reach the number. The first question is what the number was measured under.<\/p>\n

The Test Basis to Name in the Lab Request<\/h2>\n

Write the request so the report cannot drift. Name the standard and its edition, name the load class and the endpoint, and ask for the result in the exact form you will file. The lines below are what a lab needs in writing before a test starts, and they are also what lets a second lab reproduce the result later, which is what makes the number usable when cloth is in dispute. Where the lab works to the ASTM route rather than the ISO route, ASTM D4966 covers the same Martindale method, and the load class, abradant and endpoint still have to be stated, because that text is careful about how laboratory cycles should be read.<\/p>\n

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