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नेविगेशन एवं शीर्षक अनूदित हैं। संस्थान द्वारा तैयार पृष्ठ सामग्री अंग्रेज़ी में ही है। English

Post-cocoon technology covers everything that happens between the harvested cocoon and the finished yarn: stifling, drying, cooking, reeling or spinning, degumming, blending and packaging — together with the economics that decide whether any of it pays. Muga and eri part company at the very first step. Muga has 150–250 m of continuous filament and is reeled; eri’s open-mouthed cocoon yields only a few centimetres of unbroken filament and must be spun. Almost every difference downstream follows from that one fact.

40–45 %Muga raw silk from shell weight
~50 %Same, using SILKPLUS
80–85 %Of muga still reeled on the bhir
13–16 %Eri degumming loss

Cocoon to yarn — the two routes

Muga — reeled

1 Stifle & dry115–95 °C, 2 hours to stifle; to 60 % driage for storage
2 CookSodium carbonate 2.0–2.5 g/L at 95 °C, or Muga Super Cook at 2 g/L
3 ReelWet basin 50–60 °C; 8–10 cocoons for warp, 12–14 for weft
4 Re-reel & pack150 cm reel, then 2 kg and 5 kg books

Eri — spun

1 Extract pupaAfter the moth emerges, or the pupa is removed for food or seed
2 Degum1 : 30 liquor, soap 5 gpl, soda ash 1 gpl, 60 min at 90–95 °C
3 Make cakeSheets stretched, joined and stamped into a pad, dried to 20 % moisture
4 SpinTakli, flyer machine, or CSTRI motorised at 4,500 rpm

Hover a plate to lift it flat. The two chains never converge: muga holds 150–250 m of unbroken filament and can be unwound, eri holds a few centimetres and cannot. Every difference below follows from that one fact.

Muga cocoon processing

Stifling and drying to arrest the pupa, cooking to soften the sericin, reeling on the traditional bhir or the improved reeling-cum-twisting machine, then re-reeling and packing.

Eri silk spinning

Eri cocoons are spun after the pupa is removed for consumption or seed, or after the moth has emerged — which is why eri is ahimsa silk. Spinning is concentrated in Palasbari, Bijoynagar, Goalpara, Kokrajhar and Udalguri in Assam, and most of the yarn is consumed within the state.

Fibre, by-products and economics

अंतिम समीक्षा एवं अद्यतन: 15 August 2026 सामग्री का स्वामित्व सीएसबी–सीएमईआर एवं टीआई, लाहदोईगढ़