4 Types of Silk & Silkworms: Mulberry, Tussar, Muga and Eri
4 Types of Silk and Silkworms: Mulberry, Tussar, Muga and Eri Explained
Every silk saree begins long before the loom. Before a silk thread becomes a saree, blouse or shawl, an insect larva feeds, grows and spins a protective cocoon. But not every silkworm or cocoon produces the same kind of yarn. A short educational recording filmed at Bharat Tex introduces Mulberry, Tasar (Tussar), Muga and Eri. This independent guide explains their origins, cocoon structures and textile differences without borrowing images from that video.
What you will learn: the four commercially recognised silk groups; which larvae produce them; the differences between reeling and spinning; how silk fibre becomes yarn; and what to check before buying a garment labelled pure silk.
From silkworm to silk fabric: the basic process
1. Eggs and larva. Adult silk moths lay eggs that hatch into larvae, often called silkworms. The larvae feed on host plants and pass through several growth stages. The host plant and moth species vary across the silk groups.
2. Cocoon. As they mature, the larvae extrude silk proteins and form protective cocoons. The cocoon's filament characteristics vary by species and rearing conditions. A cocoon is not a finished textile or ball of commercial yarn.
3. Cocoon processing. Conventional continuous-filament silk production typically processes cocoons and reels filaments into strands. Eri cocoons are usually open-ended or otherwise unsuitable for conventional continuous reeling, so Eri fibre is commonly spun into yarn. Method choices affect fibre length, texture and processing.
4. Yarn preparation. Filaments may be combined and twisted for weaving. Staple fibres are opened, cleaned and spun. Dyeing, degumming and finishing change the eventual hand and colour.
5. Weaving and finishing. Silk yarn can become organza, crepe, satin, plain-weave saree cloth, brocade or other structures. A term such as 'mulberry' tells you about the fibre source, not the exact weave or dress quality.
The four main silk types: silkworm, cocoon, yarn and fabric
1. Mulberry silk — Bombyx mori
Silkworm: the domesticated moth Bombyx mori. Its caterpillars are raised primarily on mulberry leaves. It is the familiar source of much commercially produced filament silk. White or cream-coloured cocoons are common, although strains and processing vary.
From cocoon to yarn: conventional mulberry silk commonly involves reeling long cocoon filaments into silk thread, followed by twisting or other preparation. Filament silk may produce smooth, lustrous fabrics, but the precise surface also depends on weave and finishing.
What to buy: check whether the product specifies pure mulberry silk, a blend or a mulberry-silk-look synthetic. Saree names such as Kanjivaram or Banarasi refer to regional weaving traditions, not a guarantee that every item marketed under those names uses pure mulberry silk.
2. Tasar or Tussar silk — Antheraea species
Silkworm: tropical Indian Tasar is especially associated with Antheraea mylitta, whose larvae feed on trees such as Arjun and Asan. Temperate oak Tasar is associated with different Antheraea species and host plants. This is why a single 'Tussar worm' image cannot represent every Tasar tradition.
Cocoon and yarn: Tasar cocoons can provide reelable filament, although actual processing and yarn characteristics vary. The resulting fabric may have a natural-looking texture and muted, often tan or golden tones; dyeing can yield many other colours.
Shopping use: Tussar sarees can suit understated festive styling, printed heritage designs and breathable-looking natural textures. But roughness, weight and sheen vary by yarn, finishing and weave. Verify fibre percentages rather than trusting a 'Tussar effect' label.
3. Muga silk — Antheraea assamensis
Silkworm: Muga silk comes from the Antheraea assamensis moth, strongly associated with Assam's silk heritage. Larvae commonly feed on Som and Soalu plants. Muga is valued for its distinctive natural golden sheen.
Cocoon to yarn: collected cocoons are prepared and their silk is processed into yarn, which can then be woven into richly textured Assamese garments and accessories. The colour and lustre are affected by the natural fibre as well as finishing.
Before buying: gold-coloured fabric alone does not prove Muga silk. Seek clear material disclosure and provenance; a synthetic golden saree is not Muga merely because it looks shiny.
4. Eri silk — Samia ricini
Silkworm: Eri silk is produced by a domesticated castor-feeding silkmoth commonly referred to as Samia ricini (also described under other taxonomic combinations in older sources). Eri production is particularly associated with Northeast India.
Key yarn difference: Eri cocoons generally do not provide a continuous reelable filament in the way typical mulberry cocoons do. Fibres are commonly opened and spun, creating a yarn that can feel less glossy and more wool-like than some filament silks. Actual yarn may be fine or coarse depending on processing.
Ethical claims: Eri is sometimes marketed as 'peace silk', but the label alone does not certify that every moth survives, or establish a particular animal-welfare standard. Ask the producer about the specific process if this matters to you.
Mulberry vs Tussar vs Muga vs Eri silk: quick comparison
| Type | Silkworm | Yarn tendency | Distinguishing point |
|---|---|---|---|
| Mulberry | Bombyx mori | Frequently reeled filament | Domesticated, mulberry-fed |
| Tasar/Tussar | Antheraea spp. | Often reelable silk | Includes tropical and temperate types |
| Muga | Antheraea assamensis | Silk yarn used in woven textiles | Golden silk heritage of Assam |
| Eri | Samia ricini | Typically spun yarn | Open cocoons; softer, less filament-like character |
How silk filament is collected and prepared for weaving
Silk reeling is a specialised process in which filaments from suitable cocoons are gathered, unwound and combined to produce usable silk strands. The reeler must manage moisture, filament continuity, tension and winding speed. Reeling is particularly relevant to conventional Mulberry silk and some Tasar and Muga production, but the precise equipment and preparation vary widely.
Where cocoons cannot conveniently provide long unbroken filaments, workers may open and prepare shorter silk fibres and then spin them into yarn. The resulting yarn has more joined fibre ends, which may alter texture and light reflection. This distinction is especially useful when comparing Eri to typical reeled Mulberry silk, but neither method alone proves higher or lower quality: the finished fabric must be judged by its intended use.
For customers, remember that a sample display showing a larva, cocoon and twisted yarn illustrates different stages, not a promise about any finished saree's weave or silk percentage. A textile laboratory report or credible composition and provenance records may be more informative than showroom photographs if you are purchasing an expensive pure-silk garment.
Why a cocoon, silk filament and silk yarn are different
The larva is the growing insect. The cocoon is its protective silk structure. A filament is the long silk fibre extruded while spinning that cocoon. Yarn is the prepared strand used in textile production: sometimes built from reeled filaments and sometimes spun from shorter fibres. The video shows specimens of these stages, but audio alone does not independently verify the species identity of each visual display.
Silk quality is not determined only by cocoon colour. Filament continuity, fineness, processing, dyeing, weaving and finishing all affect what the finished textile feels like. Similarly, a single silk species can produce many garment looks through different yarns and constructions.
How to choose silk for sarees, blouses and shawls
For smooth occasion sarees: look at the weave and verified fibre composition, not just the word 'mulberry'. A silk satin, a brocade and a plain-weave silk fabric can behave differently.
For textured festivewear: Tussar and Muga may appeal for their natural-looking lustre and traditional context. Confirm authenticity and regional craft claims with the seller.
For softly textured shawls: Eri silk can be appealing in spun-yarn constructions. Check actual fabric weight and drape rather than expecting all Eri items to feel identical.
For embroidery and printed silk: fibre type and decoration are separate questions. An Ajrakh print on a silk-like fabric is not proof of silk fibre, and a golden brocade pattern is not proof of Muga silk.
Silk care and authenticity checklist
- Read the exact composition label: pure silk, blended silk and art silk are not interchangeable.
- Confirm yarn and weave where possible; these affect weight, transparency and drape.
- Ask for clear close-ups of the pallu, border and blouse piece.
- Look for independent provenance or trusted certifications when a heritage-silk claim drives the price.
- Do not rely on burn tests, shine alone or online photographs to authenticate expensive silk.
- Follow the garment's own care instructions; some silk is washable while delicate finishes and embellishments may require specialist cleaning.
- Protect vulnerable silk garments from excessive sunlight, abrasion and moisture during storage.
- For animal-welfare or sustainability claims, seek specific traceability rather than relying on buzzwords.
Frequently asked questions about silkworms and silk
Is Tussar the same as Tasar?
They are commonly alternate spellings or trade forms, although regional naming may vary.
Is Muga silk always golden?
Muga fibre is known for a natural golden cast, but actual garments can be dyed and finished in different ways. A gold colour alone does not authenticate it.
Is Eri silk always cruelty-free?
No automatic certification follows from the name. The exact cocoon processing and moth-treatment practices should be confirmed with the producer.
Does all silk come from the same silkworm?
No. Commercial silk groups involve different moth species, host plants and cocoon characteristics.
Does mulberry silk always mean satin?
No. Mulberry identifies the silk source; satin identifies a weave structure that can be made with silk or other fibres.
Are the cocoons shown in the recording enough to prove a pure-silk saree?
No. A demonstration specimen explains the source of fibre; finished garment authenticity needs separate textile composition and provenance evidence.
Explore more ClothsVilla fabric guides
Read the 31 Natural Fibres Guide, Fabric Fibres and Their Sources, and Silk Saree Fibre Label Guide. Browse sarees and blouses after checking individual product descriptions.
Sources and image credits
Technical references: International Sericultural Commission: India and Central Silk Board overview via India's Statistical Year Book. All images are independently sourced Wikimedia Commons educational references, with links and credits in the captions. Some show generic silk specimens or finished silk cloth, not a verified specimen for every named silk group. None are frames from the third-party video or product photographs supplied by ClothsVilla.