Understanding Fabric Test Reports: What SGS, TUV, and Martindale Ratings Actually Tell You

Every fabric supplier says their product is "durable" and "certified." Far fewer show you what that actually means in a real test report. If you've ever looked at a spec sheet full of standard codes like "EN ISO 12947-2" and numbers with no context, you're not alone — here's what the numbers on a real fabric test report actually tell you, and which ones matter most for your project.

Martindale Rub Count — The Durability Number

This is usually the first number worth checking. Martindale testing — standardised as EN ISO 12947 — rubs a fabric sample against an abrasive surface in a controlled machine and counts how many cycles it survives before visible wear appears. As a rough guide: under 10,000 cycles suits light domestic use, 10,000–25,000 suits general household furniture, and 25,000-plus is generally considered commercial-grade. We cover this in more depth in our upholstery fabric buying guide.

Colour fastness Ratings — Not Just One Number

"Colourfastness" isn't a single test — a proper report breaks it down by what the colour is being tested against: rubbing (dry and wet), light exposure, and sometimes water exposure specific to the end use, like chlorinated pool water or sea water for outdoor fabric. Ratings typically run on a 1–5 scale, or 1–8 for lightfastness specifically, where higher is better. A fabric can have excellent rub resistance and still fade badly in direct sun if its lightfastness rating is low — the two aren't the same test, and a genuine report will show both separately.

Fire Retardancy — Ask Which Standard, Not Just "Yes or No"

“Fire-rated” isn’t a single universal claim. Standards differ by market and by test method — for example, TB 117 (the California Technical Bulletin) tests how a material resists a smouldering ignition source such as a cigarette, while other standards use different ignition sources and pass criteria, and a fabric can meet one standard without necessarily having been tested against another. For any commercial or hospitality project, ask specifically which standard and test method a fabric was tested against, rather than accepting “fire retardant” as a blanket claim.

Tensile Strength and Tear Resistance — The Numbers Behind "Sturdy"

These measure how much force a fabric can withstand before it tears, both along the length (warp) and across the width (weft) of the weave — relevant anywhere fabric gets pulled, stretched, or sits under structural tension, like tightly upholstered furniture or seams in regular use.

Why This Matters More for Some Projects Than Others

A residential cushion cover doesn't need the same paper trail as a hotel refurbishment or a restaurant chain's seating order. But for any commercial or hospitality project, procurement and design teams typically expect to see this kind of documentation before finalising a supplier — and asking for it upfront saves time later. IDX publishes independent test reports for our fabrics rather than relying on marketing descriptions alone.

Reading a Report? Here's What to Check First

• The testing standard cited (EN ISO, BS, or similar) — not just a pass/fail claim
• Whether rub count, colourfastness, and fire testing are all present, not just one
• Whether the report is specific to the fabric you're ordering, not a generic collection-wide claim