Muga silk

Overview

Production: about 230 tonnes of raw silk (Indian muga silk, about 0.6% of India's raw silk output, as reported in the 2025-26 annual report). Main producers: India (Assam). [1]

A silk associated with Assam and the muga silkworm. Distinct origin and species claims deserve documentation.

Feel and behavior

Known for a natural golden character.

Where you find it

Traditional dress, fine woven cloth and accessories.

Source and geography

Muga silk is produced by Antheraea assamensis Helfer, a saturniid silkmoth endemic to northeastern India, with production centered in Assam. Larvae are reared outdoors on trees, principally som (Persea bombycina), and the culture supports rural and tribal households. Researchers at the Central Silk Board's Central Muga Eri Research and Training Institute in Jorhat have reported that air pollution, including emissions near an oil refinery, stresses som trees and is a concern for sustaining production, and A. assamensis is also vulnerable to bacterial and viral diseases that reduce silk yields.

Worth knowing

• Muga Silk of Assam received geographical indication status in 2007 and a registered GI logo in 2014.
• Muga makes up well under 1 percent of India's raw silk output.
• The Central Muga Eri Research and Training Institute has listed a project to develop a portable analyzer for muga purity in dyed fabrics.

Types, grades and fabrics

Types and grades

Muga silk comes from Antheraea assamensis reared outdoors on som and other host trees in Assam, and is the rarest of India's commercial silks: the Ministry of Textiles reports roughly 230 tonnes, about 0.6 percent of Indian raw silk, in its 2025-26 annual report. Trade forms are reeled raw muga yarn, spun muga from pierced cocoons and waste, and blends with mulberry (pat) silk or cotton. Assam's silk tradition groups muga with eri and pat. Muga Silk of Assam has been a registered geographical indication since 2007, and a GI logo followed in 2014, with the Assam Science Technology and Environment Council as its registered proprietor.

Fabrics and products

Muga is woven mainly on handlooms around Sualkuchi and other Assamese weaving centers into the mekhela chador (a two-piece garment), riha, saris and stoles. It is usually left in its natural golden color, with woven motifs in contrasting threads. Muga is sometimes combined with pat or eri silk in the same garment. Small quantities go into ties, handbags and export accessories. Its stiffness and weight suit structured drape rather than soft, fluid garments.

Buying and care

How to judge quality

Genuine muga has a natural golden luster that deepens with age and washing, a firm, crisp hand and a relatively high price. Uniform bright gold at a low price suggests dyed mulberry silk, polyester or a blend; adulteration has damaged muga's reputation, according to Assamese reporting. Look for the GI logo, Silk Mark labeling and the seller's authorized-user status, and ask for a test certificate on high-value garments. The Sualkuchi silk testing laboratory and other certified labs test for muga content. Hand-reeled muga shows slight variations in thickness, while perfectly even yarn deserves scrutiny.

Care in detail

Many Assamese owners hand wash muga in cool water with a mild, neutral soap or shampoo, which traditional accounts say brightens its luster; dry cleaning is an alternative for garments with mixed fibers or zari work. Do not soak for long, wring or scrub. Rinse, roll in a towel and dry in shade, as direct sun can weaken the silk. Iron on the reverse at a low silk setting while slightly damp. Store folded in soft cotton cloth, refolding occasionally to avoid crease breaks, with protection against carpet beetles and silverfish. Keep perfume and deodorant off the fabric. The product label governs.

Care at a glance

Follow the complete product’s care label. Blends, dyes, finishes and construction can change suitable washing, drying and storage.

Environmental and social footprint

Muga rearing is an outdoor activity on som and other host trees, needing no irrigation or mulberry cultivation, but it exposes larvae to birds, insects, disease and weather, and research has linked air pollution near industrial sites to stress on host trees. Production is tiny, about 0.6 percent of India's raw silk, so the industry's footprint is small in absolute terms; no life cycle assessment of muga fabric was found. Reeling kills pupae, as with most reeled silk. Socially, muga sustains rearers, reelers and handloom weavers in Assam, and adulteration undercuts genuine producers, which is why the GI logo and testing projects at the Central Muga Eri Research and Training Institute matter.

Tradeoffs

Origin, processing inputs, labor, product construction and useful lifetime all need specific evidence. The name alone does not establish responsible production.

A useful question to ask: What exact material, product form and documented producer stand behind this name?

Science

Protein: fibroin

Silkworms form a protein filament. Reeling, spinning and degumming change its textile form.

Structure and chemistry

Muga filaments consist of fibroin in a sericin coating, with the flatter, coarser cross-section typical of Antheraea silks. Its fibroin has alanine-rich crystalline domains and contains RGD tripeptide motifs, and comparative testing (Fang et al., 2016) found muga more extensible and tougher in some respects than Bombyx mori silk, with properties tied to beta-sheet content, crystallinity and orientation. The golden color is natural rather than dyed. Muga fibroin has been processed into cryogels and porous scaffolds for liver and cartilage tissue engineering research, where its scaffolds supported more cartilage matrix production than mulberry fibroin in one comparison.

From source to yarn

Rearing is outdoors on som trees, where larvae must be protected from birds, insects, weather and disease, and they are moved to fresh trees as foliage is consumed. Mature larvae spin cocoons that are stifled and then cooked in mild alkaline solutions before reeling, and the raw silk is traditionally woven on handlooms into Assamese garments such as the mekhela chador, usually in its natural color. Pierced cocoons and waste are spun into lower-grade yarn. Because all stages depend on a single regional host system, weather and pollution directly affect supply.

Performance in use

Muga is valued for durability and its golden luster, which is used in its natural color rather than dyed over. Like other non-mulberry silks it shows higher extensibility than mulberry silk in laboratory tests. As a protein fiber it absorbs moisture, chars rather than melts, and is weakened by alkali, chlorine bleach and prolonged sunlight. Statements that its luster increases with every wash are traditional descriptions rather than standardized test results, and care instructions from the maker should govern cleaning.

How it is identified

Burn tests (indicative only; conduct safely) confirm silk but not species. Microscopy shows the flattened cross-section typical of Antheraea silk, and spectroscopic methods reflect alanine-rich fibroin, but separating muga from other golden wild silks or from dyed mulberry silk can require specialist analysis. Imitation of muga by cheaper silks is a known concern, so buyers should look for registered geographical indication users or Silk Mark labeling and request laboratory testing for high-value pieces.

History

Timeline

1. 2007Muga Silk of Assam was registered as a geographical indication. [2]
2. 2014A registered GI logo for muga silk followed, strengthening authentication of genuine products. [2]
3. 2016A comparative study of commercial silks found muga and other non-mulberry fibers more extensible than Bombyx mori silk. [3]
4. 2016Muga silk fibroin constructs were studied for cartilage tissue engineering. [4]
5. 2023A study assessed the air pollution tolerance of som, the muga silkworm's primary host tree, near industrial sites. [6]
6. 2025Reference genes were validated for RT-qPCR studies of Antheraea assamensis under bacterial and viral infection. [5]

Muga holds a particular place in Assamese textile heritage. Modern provenance claims should preserve that geographic specificity instead of treating the name as merely a color.

The deeper record

Muga has long been part of Assamese textile heritage, and its survival depends on an outdoor rearing system confined to one region. That dependence has shaped recent research: studies on air pollution tolerance of som trees near industrial sites, validation of reference genes for studying A. assamensis immunity under bacterial and viral infection (2025), and a 2025 genome-wide comparison of antimicrobial attacin genes across A. assamensis, A. pernyi, A. mylitta, A. yamamai and Samia ricini. Biomaterials work since the 2010s has added a new, non-textile interest in muga fibroin.

Labeling and law

The generic fiber name is silk in the US and the EU; muga is a qualifier indicating species and regional origin. In India, Muga Silk of Assam is registered as a geographical indication under the Geographical Indications of Goods (Registration and Protection) Act, 1999, which reserves the registered name for authorized producers of goods from the defined area. A geographical indication protects a name where it is registered but does not itself test fiber purity, so Silk Mark labeling and laboratory testing are complementary tools. Protection outside India depends on local law.

This describes what rules and standards cover. It is not legal advice; jurisdiction, product form and current rule text control.

Frequently asked

Why is muga silk golden?

The color is natural to the silk produced by Antheraea assamensis and is not dyed. It varies slightly with rearing season and host tree, and is often described as deepening with age.

How can I tell real muga from fake?

Buy from authorized GI users, look for the muga GI logo and Silk Mark label, and request a laboratory test for expensive pieces. Real muga has a natural, not glaring, gold and a firm hand; unusually low prices are a warning sign.

Why is muga silk so expensive?

It is produced only in Assam in small quantities, about 230 tonnes a year according to the Ministry of Textiles, by outdoor rearing that is exposed to weather and disease, and it is mainly hand-reeled and handwoven.

Can muga silk be washed?

Yes. Hand washing in cool water with a mild soap is traditional for muga, and it is known for tolerating washing well. Dry clean pieces with metallic zari or mixed fibers.

Sources

• Food and Agriculture Organization: Harvesting of textile animal fibres
• Heliyon: Air pollution tolerance index of som, primary food plant of the muga silkworm (2023)
• Journal of Materials Chemistry B: Structural-mechanical relationship in mulberry and non-mulberry silkworm silks (Fang et al., 2016)
• Journal of Materials Chemistry B: Silk fibroin constructs of muga silkworm Antheraea assamensis for cartilage tissue engineering (2016)
• Molecular Biology Reports: Reference genes for RT-qPCR in Antheraea assamensis during pathogenic infections (2025)
• Biomedical Materials: Nonmulberry silk proteins, multipurpose ingredient in bio-functional assembly (2021)
• The Shillong Times: GI logo boost to Assam's golden hue (2014)
• SpicyIP: When Tezpur University came to GI-tagged Muga Silk of Assam's rescue (2015)
• The Sentinel Assam: Pure muga silk products, purity testing methods to be exhibited
• Ministry of Textiles (India): Annual Report 2025-26
• Silk Mark Organisation of India: About SMOI

Cite this page

Chaos. (2026). Muga silk. In Fibers of Earth: An independent textile atlas. https://www.hendrickresearch.com/fibers/materials/muga-silk/