What makes a silk rug different
A silk rug is knotted the same way as a wool rug, but silk yarn is far finer and stronger, so weavers can tie many more knots in the same space. That allows fine curved designs and a bright sheen. It also makes each rug slower and more expensive to weave.
Two constructions are common:
- Pure silk. Silk pile, often on a silk foundation. Light, thin and very fine.
- Wool-silk. A wool pile with silk used for outlines, flowers or highlights. Buyers then care about how much of the pile is silk.
Srinagar weaves silk carpets under the Kashmir Handmade Carpet geographical indication and is a Town of Export Excellence for handicrafts. The Carpet Export Promotion Council (CEPC) also lists Bhadohi and Varanasi among India's producing centres. IBEF reports silk carpet exports of US$51.5 million from April 2025 to February 2026 (IBEF silk page, updated August 2026). Wool-only pieces are covered on the hand-knotted wool rugs page.
Is it really silk?
Viscose and mercerised cotton both shine like silk and cost a fraction of the price. In trade they are sometimes called "art silk", "bamboo silk" or "banana silk". None of these is silk.
| Method | What it shows | Limits |
|---|---|---|
| Burn test on a loose tuft (with your consent) | Silk burns slowly, smells like burnt hair and leaves a black bead that crushes. Viscose and cotton burn fast, smell like paper and leave soft grey ash. | Screening only. A blend gives a mixed result. |
| Feel and warmth | Silk feels warm and slightly dry; viscose feels cool and slippery. | Subjective; never used alone. |
| Wet behaviour | A drop of water on viscose darkens and flattens the pile quickly. | Can mark the rug; done only on a hidden spot or offcut. |
| Lab fibre analysis | Microscopy or infrared spectroscopy identifies the fibre, and quantitative analysis gives the blend. | Needs a sample sent to an accredited lab. |
The inspector collects yarn from the weaver's stock or loom-end trimmings where possible, so the finished rug is not cut. For a fibre claim on a label, a lab report is the evidence. We can pull and seal samples through lab testing coordination.
Other checks on silk and wool-silk rugs
| Check | How it is checked | What fails |
|---|---|---|
| Knot count | Counted on the back with a magnifier at several places; fine silk counts are easy to over-state | Count below the agreed figure |
| Reverse-side tightness | Back examined for loose knots and gaps between rows | Loose knots or uneven beating that will open with use |
| Shading and pile direction | Rug viewed from all four sides in the same light | Patches with pile laid the wrong way, which show as dark blotches from one side |
| Silk share in wool-silk | Silk areas compared with the approved design and strike-off | Silk highlights missing, reduced or swapped for viscose |
| Dye fastness | Damp white cloth on deep silk colours and on silk next to a pale wool ground | Colour transfer or a halo where silk meets wool |
| Water marks | Surface viewed at a low angle after washing and drying | Rings, tide marks or flattened areas |
| Size, fringe and binding | Size and diagonals; silk fringe checked for splits and knots | Out of tolerance, frayed or uneven fringe |
Common silk and wool-silk rug defects and how they are classed
| Defect | Class |
|---|---|
| Pile labelled silk but made of viscose or cotton | Critical (mislabelling) |
| Kashmir origin claimed for a rug made elsewhere | Critical (false claim) |
| Knot count below the agreed figure | Major |
| Dye bleeding from silk into the ground | Major |
| Pile-direction patch visible from the front | Major |
| Water ring or tide mark | Major |
| Small frayed fringe ends | Minor |
Classes are the usual starting point; your defect list decides the final one.
Labels, claims and other rules
- Fibre names. In the US, fibre content must use generic names under the Textile Act and must not mislead; "art silk" is not a fibre name. In the EU, "silk" is reserved for fibre from silk-secreting insects under Regulation (EU) 1007/2011, and the label covers the textile upper layer of a rug. See EU textile labelling.
- Flammability. US carpets and rugs need a General Certificate of Conformity to 16 CFR 1630 (large) or 1631 (small), based on a test or a reasonable testing program; a rug made for children needs testing by a CPSC-accepted lab. A small rug that fails can only be sold with a permanent "FLAMMABLE" label.
- Origin. Country of origin goes on the label in the US; check your market on the country of origin labelling page. A geographical indication claim should be backed by the producer's documents.
- Labour. The US Department of Labor lists carpets from India for child labour and forced labour, and the EU Forced Labour Regulation (EU) 2024/3015 applies from 14 December 2027. Plan supplier due diligence beyond the inspection.
Packing and what to put in your purchase order
Silk rugs mark easily. They should be rolled pile-out with acid-free paper or clean cotton sheeting inside the roll, never folded, and kept away from damp: a wet silk pile can stain and lose shape. The inspector checks wrapping, roll direction, carton or sack marks and that each rug's label matches its documents.
- Fibre of pile and foundation, and for wool-silk the share or areas in silk.
- Knot count and how it is measured.
- Whether a lab fibre test is required before shipment, and which lab.
- Size tolerance, fringe material and binding.
- Exact label wording for fibre, origin and any geographical indication.
For lower-priced sheen rugs made on purpose from viscose, see viscose rugs.
Sources
- FTC: Threading your way through the labeling requirements under the Textile and Wool Acts
- Regulation (EU) No 1007/2011 on textile fibre names and labelling
- CPSC: Carpets and rugs (16 CFR 1630 and 1631)
- US Department of Labor, ILAB: India (List of Goods entries)
- Regulation (EU) 2024/3015 on products made with forced labour
- CEPC: An overview of the Indian handmade carpet industry (Jan 2021)
- DGFT: Appendix 1B, Towns of Export Excellence
- IBEF: Indian silk industry