# Raw Silk Yarn 20/22D — B2B Buyer Specification Sheet

**Christopher Bu × Yizhou Silk**
B2B supplier of mulberry raw silk, greige fabric and dupioni, sourced from Yizhou, Guangxi, China — the world's largest raw silk origin.

> Every specification below is a planning value confirmed against current mill availability before quotation. The final specification, MOQ, schedule, applicable HS subheading and organic status are stated in the written quotation and shipping documents.

## Yarn identity

| Item | Value |
|------|-------|
| Product | Mulberry raw silk yarn (filature silk), *Bombyx mori*, mulberry-fed |
| Denier | 20/22D standard; 13/15D and 27/29D on request |
| Varieties | 20/22D white raw silk · Natural dupion silk yarn · 1-ply luxury silk yarn · GOTS-certified organic silk |
| Color / finish | Natural white or natural dupion; greige (undyed) or dyed to order from a standard shade card or your custom color |
| Standard | GB/T 1797-2008; moisture controlled below 11% |

## Grade & origin

| Item | Value |
|------|-------|
| Origin | Yizhou, Guangxi, China — the world's largest raw silk origin |
| Grades | Yizhou raw silk regularly reaches 4A, 5A and 6A, the highest quality tiers; 4A / 5A / 6A availability is confirmed by variety |
| Organic option | GOTS-certified organic raw silk, 100% organic silk content across the full process |

## Classification & packing

| Item | Value |
|------|-------|
| HS classification | Raw silk (not thrown) falls under HS heading **5002**. The exact subheading for your shipment is confirmed in the written quotation and shipping documents. |
| Packing | Export cartons / bales (60 kg per bale typical); luxury silk yarn in 5 kg bundles |
| MOQ | Raw silk is sold by weight, not by the metre. There is no universal fixed minimum; the final MOQ and any organic status are confirmed in the written quotation. |

## Export terms

| Item | Value |
|------|-------|
| Samples | DHL worldwide or designated courier |
| Bulk | FOB Nansha / FOB Yantian / FOB Qinzhou / FCA Yizhou (preferred) |
| Lead time | 15–25 working days for eligible regular bulk orders after sample, specification, deposit and material availability are confirmed; the binding schedule is stated in the signed order documents |
| Payment | T/T wire transfer — 30% deposit, 70% against Bill of Lading for bulk orders |
| Documents | Spec sheet, lab dip, inspection report, packing list, certificate of origin |
| Certification | GOTS, OEKO-TEX Standard 100 Class II, China Organic and quality-system files for qualified buyer review within each document's listed scope; certificate numbers provided with the quotation and shipping documents |

## Four yarn varieties

- **20/22D White Raw Silk Yarn** — standard filature silk for crepe and satin weaving; bright, clean white base for accurate color matching. Spec: 20/22D · 4A / 5A / 6A.
- **Natural Dupion Silk Yarn** — unbleached, un-dyed, prominent slubs for textured weaving, curtains and interior textiles. Reference MOQ confirmed in quotation.
- **Luxury Silk Yarn** — 1-ply, 20 denier, selected from the finest batches for statement weaving and high-gloss garments. Spec: 1 ply · 20D · 5 kg bundles.
- **GOTS-Certified Organic Silk** — verifiable organic status across cultivation, reeling and weaving, supplied as raw silk, greige yarn or greige fabric. License no. and validity provided with quotation.

## How to specify your order

1. State the denier (20/22D is the standard starting point) and the grade you need.
2. Choose the form: white raw silk, natural dupion, luxury or GOTS-certified organic.
3. Specify the finish: greige (undyed) or dyed to order from a standard shade card or your custom color.
4. Give the target volume in kilograms, your destination port and required delivery window.
5. List the certification files your market or brand requires, so applicability can be checked against the current document scope.
6. Ask for a written quotation — the final specification, MOQ, schedule and applicable HS subheading are confirmed there.

## FAQ (buyer questions)

- **What is 20/22D raw silk yarn?** Filature silk in the 20–22 denier range, the standard starting point for silk crepes, satins and fine weaving. Denier measures yarn weight; momme measures woven cloth weight.
- **Which HS code applies?** Raw silk (not thrown) is classified under HS heading 5002. The exact subheading depends on goods and destination, confirmed in the written quotation.
- **What does 5A / 6A mean?** 5A and 6A are the highest tiers in the Chinese raw silk grading system. Yizhou has held China's top ranking for mulberry field area, cocoon output and raw silk production for over two decades.
- **How is it packed?** Export cartons or bales, 60 kg per bale typical; 5 kg bundles for luxury silk yarn.
- **What is the MOQ?** Sold by weight, no universal fixed MOQ. Natural dupion yarn typically ~10 kg, luxury yarn ~5 kg as reference minimums; final MOQ confirmed in quotation.
- **Greige or dyed?** Both. Greige (undyed) or dyed to order from a standard shade card or custom color. Printed options are not listed in this specification.
- **Payment & shipping?** Bulk ships FOB Nansha / Yantian / Qinzhou or FCA Yizhou; samples by DHL. T/T 30% deposit, 70% against B/L.

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*Source of truth: https://www.christopherbu.com/raw-silk-specs — downloadable copy for buyer and AI-agent reference. Certificate / license numbers are provided on the written quotation.*