Every year, thousands of buyers purchase rugs labeled “Persian” only to discover later that they bought a machine-made imitation or a hand-tufted rug that will last a decade rather than a century. The labels “Persian style,” “Persian inspired,” and even “Made in Iran” do not guarantee a genuine hand-knotted Persian rug. Here is a four-step verification process anyone can perform.
Step 1: Flip the Rug Over
This is the single most reliable test. On a genuine hand-knotted rug, the underside reveals the pattern clearly — nearly as sharp as the front. You can see individual knots as small bumps, and the design reads correctly in mirror image. On a machine-made rug, you’ll find a uniform latex, canvas, or cotton backing that hides the construction entirely. On a hand-tufted rug, there’s a canvas backing glued on — lift a corner and you’ll often find it peeling.
Step 2: Look for Abrash
Abrash is the slight, natural color variation that appears in authentic hand-knotted rugs — a horizontal banding where the color shifts subtly from one area to another. It results from natural variations in the dye bath or the wool itself. A perfectly uniform field with no color variation is almost always a sign of synthetic dye or machine production. Abrash is not a flaw — it is a certificate of authenticity.
Step 3: Count the Knots
Flip the rug and count the knots per linear inch in both directions. A 100 KPSI (knots per square inch) rug will have 10 knots per inch in each direction. Use a ruler and count carefully. If the number is very high (300+), you have a fine rug. If you cannot find individual knots — if the back looks like a continuous surface — it is not hand-knotted.
Step 4: The Fringe Test
On a genuine hand-knotted rug, the fringe is structural — it is the extension of the foundation warp threads that ran the length of the rug during weaving. Pull gently on the fringe: it should connect directly into the body of the rug. On machine-made rugs, fringe is sewn on as decoration and will come away from the body of the rug if pulled.
Bonus: The Dye Bleed Test
Wet a white cloth and rub it firmly on a colored section of the rug. Some transfer is normal on naturally dyed rugs — but if significant color comes off, the dye is poorly fixed or of low quality. Synthetic dyes bleed more readily than well-fixed natural dyes.
Where to Buy Genuine Persian Rugs Near Seattle
At Afshar Carpet in Kent, WA, every rug in our gallery is hand-verified by our family experts before it goes on the floor. We’re happy to walk you through the back of any rug, explain the knot type, and tell you the story of its origin. Visit our showroom or shop Persian rugs online.