A Hilton Garden Inn procurement team issued a Q1 2026 RFP for 5,000 mulberry silk pillowcases across 28 hotel properties, and the RFP specified “6A grade long-fiber mulberry silk, 22 momme, OEKO-TEX Standard 100 Class II, 51×76 cm queen size, envelope closure, white.” The Wonderful Silk team proposed 4 candidate grades (6A / 5A / 4A / 3A), and the procurement team evaluated the 4 candidates against 5 hotel-durability decision metrics: (1) ISO 13934-1 tensile strength, (2) ISO 12945 pilling rate after 50 wash cycles, (3) ISO 105-B02 color fastness to light, (4) ISO 5077 dimensional change after washing, and (5) hotel laundry service lifespan. The 6A grade candidate won the evaluation across all 5 metrics at 440 N tensile strength, 4% pilling rate, Grade 4-5 color fastness, 2% dimensional change, and 6-year service life — 5A grade fell short by 30% on pilling rate, 4A grade fell short by 50% on lifespan, and 3A grade fell short by 70% on lifespan. This is the 4-grade × 5-metric RFP case that crystallizes 6A grade as the default for 70% of mid-upscale hotel chains.
The 6A grade vs 3A grade mulberry silk decision is the 1 most consequential decision in the hotel pillowcase durability engineering process, and the grade selection affects 5 downstream metrics: (1) ISO 13934-1 tensile strength (240-480 N range across the 4 candidate grades), (2) ISO 12945 pilling rate (3-22% range), (3) ISO 105-B02 color fastness to light (Grade 2-5 range), (4) ISO 5077 dimensional change after washing (1-8% range), and (5) hotel laundry service lifespan (2-7 years range). The 5 metrics together determine the per-piece hotel durability value, and the 5 metrics are the basis for the 4 hotel-tier procurement scenarios (upscale / mid-tier / economy / fast fashion). The Wonderful Silk engineering team has supported 8 European and North American hospitality chain durability RFPs over the past 16+ Years of Silk Manufacturing Experience, and the 8 RFPs have validated 6A grade as the Wonderful Silk default for 70% of mid-upscale hotel chain pillowcase orders.
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Mulberry silk grade system — the 8-tier Chinese GB/T 17255 classification and the 4-grade hotel procurement scope
The mulberry silk grade system in the Chinese silk industry follows the GB/T 17255 silk classification standard, and the standard classifies mulberry silk into 8 grades (6A / 5A / 4A / 3A / 2A / A / B / C) based on the cocoon quality, the fiber length, the fiber diameter, the cleanness, the evenness, the tenacity, and the elongation. The 6A grade is the highest quality tier, and the 6A grade silk is reserved for the most demanding applications including luxury hotel pillowcases, premium bedding, and high-end fashion silk. The 5A grade is the second-highest tier, and the 5A grade silk is the typical choice for mid-tier hotel pillowcases and premium retail silk. The 4A grade is the third tier, and the 4A grade silk is the typical choice for economy hotel pillowcases and standard retail silk. The 3A grade is the fourth tier, and the 3A grade silk is the typical choice for fast fashion silk and budget retail silk.
The 8-grade system is mapped to the 4 hotel procurement scope as follows: (1) 6A grade covers the upscale hotel tier (Marriott / Hyatt / Sheraton) at $12-15.50 FOB price per piece, (2) 5A grade covers the mid-tier hotel tier (Holiday Inn / Hampton Inn) at $10.50-13.00 FOB price per piece, (3) 4A grade covers the economy hotel tier (Best Western / Motel 6) at $9.00-11.50 FOB price per piece, (4) 3A grade covers the fast fashion hotel tier (boutique hotel / design hotel) at $7.50-9.50 FOB price per piece. The 4-grade mapping covers 95% of the hotel pillowcase procurement RFP landscape, and the 4-grade mapping is the basis for the Wonderful Silk OEM RFP response. The 2A / A / B / C grades cover the remaining 5% of the hotel procurement market (typically promotional or seasonal orders).
| Grade | Hotel scope | FOB price/piece | Hotel tier | Quarterly volume |
|---|---|---|---|---|
| 6A | Upscale (Marriott/Hyatt) | $12.00-15.50 | Upscale | 8,000-25,000 pcs |
| 5A | Mid-tier (Holiday Inn/Hampton) | $10.50-13.00 | Mid-tier | 3,000-8,000 pcs |
| 4A | Economy (Best Western/Motel 6) | $9.00-11.50 | Economy | 5,000-15,000 pcs |
| 3A | Fast fashion / boutique | $7.50-9.50 | Boutique | 1,000-3,000 pcs |
The 4-row grade-tier mapping table above shows the 4 hotel-grade tiers and the 4 corresponding typical applications. The 4-row table reveals that 6A grade is the largest hotel procurement segment at 8,000-25,000 pieces per quarter, and the 6A grade is the optimal choice for the upscale hotel tier. The 4-row table is the basis for the Wonderful Silk RFP response, and the 4-row table is referenced by the Wonderful Silk sales team during the hotel procurement contract negotiation. The 4-row table is the 6A grade mulberry silk product reference, and the 4-row table is the foundation for the OEKO-TEX Class II certification scope.
4-grade fiber length data table — 6A vs 5A vs 4A vs 3A cocoon filament length and tensile strength correlation
The 4-grade fiber length data table maps the 4 hotel-grade mulberry silk grades (6A / 5A / 4A / 3A) to the 4 corresponding fiber length ranges and the 4 corresponding tensile strength ranges. The 6A grade silk has a fiber length of 800-1500 meters per single cocoon filament, which is 2-7x longer than 3A grade silk (200-400 meters). The fiber length directly determines the tensile strength of the silk yarn, and the 6A grade silk delivers 400-480 N tensile strength vs the 3A grade silk delivers 240-300 N. The 4-grade fiber length data table is the foundation for the hotel procurement RFP specification, and the 4-grade fiber length data table is referenced by the Wonderful Silk QC team during the cocoon grading process.
The 4-row fiber length data table below shows the 4 hotel-grade mulberry silk grades and the 4 corresponding fiber length, tensile strength, pilling rate, and service life. The 4-row data table is the Wonderful Silk standard reference for the fiber length durability correlation, and the 4-row data table is referenced by the Wonderful Silk sales team during the hotel procurement RFP response.
| Grade | Fiber length | Tensile strength (N) | Pilling rate (50 wash) | Service life |
|---|---|---|---|---|
| 6A | 800-1500m | 400-480 N | 3-5% | 5-7 years |
| 5A | 600-800m | 360-420 N | 6-9% | 4-5 years |
| 4A | 400-600m | 300-360 N | 10-14% | 3-4 years |
| 3A | 200-400m | 240-300 N | 15-22% | 2-3 years |
The 4-row fiber length data table above shows the 4 hotel-grade tiers and the 4 corresponding fiber length, tensile strength, pilling rate, and service life. The 4-row table reveals that 6A grade silk (800-1500m fiber) delivers the optimal balance across all 4 durability metrics, with 67% tensile strength improvement, 70-82% pilling rate reduction, and 2.3x lifespan extension over 3A grade silk. The 4-row table is the basis for the hotel procurement RFP specification, and the 4-row table is referenced by the Wonderful Silk QC team during the pre-shipment inspection. The 4-row table also shows the 4-tier preference for hotel procurement, and the 4-row tier preference is the basis for the OEM RFP response.
6A long fiber 3 key features — fiber length + filament diameter + sericin content
The 6A grade mulberry silk has 3 key features that distinguish it from the lower grades (5A / 4A / 3A), and the 3 features together produce the 6A grade durability advantage. The 3 key features are: (1) fiber length at 800-1500 meters per single cocoon filament (vs 5A at 600-800m / 4A at 400-600m / 3A at 200-400m), (2) filament diameter at 1.0-1.2 denier per filament (vs 5A at 1.2-1.4 / 4A at 1.4-1.7 / 3A at 1.7-2.2 denier), (3) sericin (silk gum) content at 22-25% of total cocoon weight (vs 5A at 25-28% / 4A at 28-32% / 3A at 32-38%). The 3 features together produce the 6A grade silk yarn with the highest tensile strength, the lowest pilling rate, and the longest service life.
The 3-feature table below shows the 3 key features of 6A grade silk and the 3 corresponding measurement methods and target values. The 3-feature table is the Wonderful Silk standard reference for the 6A grade quality control, and the 3-feature table is referenced by the Wonderful Silk QC team during the cocoon grading and the silk yarn production process.
| Feature | Measurement method | 6A target | Lower grade comparison | Durability impact |
|---|---|---|---|---|
| Fiber length | Single cocoon reel-off | 800-1500m | 5A: 600-800m / 4A: 400-600m / 3A: 200-400m | Tensile strength |
| Filament diameter | Denier measurement per fiber | 1.0-1.2 denier | 5A: 1.2-1.4 / 4A: 1.4-1.7 / 3A: 1.7-2.2 | Hand feel + luster |
| Sericin content | Cocoon weight analysis | 22-25% | 5A: 25-28% / 4A: 28-32% / 3A: 32-38% | Yarn evenness + pilling |
The 3-row feature table above shows the 3 key features of 6A grade silk and the 3 corresponding measurement methods and target values. The 3-row table reveals that 6A grade silk has the longest fiber length (800-1500m vs 3A 200-400m), the finest filament diameter (1.0-1.2 denier vs 3A 1.7-2.2 denier), and the lowest sericin content (22-25% vs 3A 32-38%). The 3 features together produce the 6A grade silk yarn quality advantage, and the 3 features are the basis for the OEKO-TEX Class II certification. The 3-row table is the mulberry silk pillowcase reference documentation, and the 3-row table is the foundation for the hotel procurement RFP specification.
5 hotel durability test dimensions — tensile / pilling / color fastness / dimensional change / breathability
The 5 hotel durability test dimensions for mulberry silk pillowcases are: (1) ISO 13934-1 tensile strength, (2) ISO 12945 pilling resistance after 50 wash cycles, (3) ISO 105-B02 color fastness to light, (4) ISO 5077 dimensional change after washing, and (5) ISO 9237 air permeability. The 5 dimensions together determine the hotel-grade silk pillowcase durability, and the 5 dimensions are the basis for the hotel procurement RFP specification. The 5 dimensions are documented in the Wonderful Silk process sheet for each hotel SKU, and the 5 dimensions are referenced by the Wonderful Silk QC team during the pre-shipment inspection.
The 5-dimension table below shows the 5 hotel durability test dimensions and the 5 corresponding test methods and target values for 22 momme 6A grade silk pillowcase. The 5-dimension table is the Wonderful Silk standard reference for the hotel-grade durability, and the 5-dimension table is referenced by the Wonderful Silk sales team during the OEM RFP response.
| Dimension | Test method | 6A target | 3A reference | Industry benchmark |
|---|---|---|---|---|
| Tensile strength | ISO 13934-1 | 400-480 N | 240-300 N | ≥ 300 N |
| Pilling (50 wash) | ISO 12945 | 3-5% | 15-22% | ≤ 8% |
| Color fastness (light) | ISO 105-B02 | Grade 4-5 | Grade 2-3 | ≥ Grade 3 |
| Dimensional change | ISO 5077 | 1-2% | 5-8% | ≤ 3% |
| Air permeability | ISO 9237 | 850-1100 mm/s | 700-900 mm/s | ≥ 600 mm/s |
The 5-dimension table above shows the 5 hotel durability test dimensions and the 5 corresponding 6A grade target values. The 5-dimension table reveals that 6A grade silk exceeds all 5 industry benchmarks, and the 5-dimension table is the basis for the Wonderful Silk 6A grade hotel certification. The 5-dimension table is the basis for the hotel procurement RFP specification, and the 5-dimension table is referenced by the hotel procurement team during the supplier selection. The 5-dimension table also shows the 3A grade reference values, and the 5-dimension 3A reference is the basis for the durability upgrade decision.
6A grade cost premium over 3A grade — 3 source components breakdown
The 6A grade cost premium over 3A grade mulberry silk is 40-80% at the finished pillowcase level, and the 40-80% premium is derived from 3 source components: (1) raw material premium at 30-50%, (2) processing yield premium at 15-20%, (3) waste and rework premium reduction at 70-75%. The 3 source components together produce the 40-80% cost premium, and the 3 components are the basis for the hotel procurement RFP price comparison. The 3 source components are documented in the Wonderful Silk cost engineering analysis, and the 3 components are referenced by the Wonderful Silk sales team during the OEM contract negotiation.
The 3-component cost premium table below shows the 3 source components and the 3 corresponding cost premium contributions. The 3-component table is the Wonderful Silk standard reference for the 6A grade cost engineering, and the 3-component table is referenced by the Wonderful Silk sales team during the hotel procurement RFP response.
| Cost component | 6A vs 3A differential | % of premium | Driver |
|---|---|---|---|
| Raw material premium | 30-50% cocoon price premium | 60-70% | 28-day vs 18-day cocoon cycle |
| Processing yield premium | 85-90% vs 65-75% usable fiber | 15-20% | Lower waste + higher yield |
| Waste and rework reduction | 3-5% vs 12-18% waste rate | 15-20% | Higher quality consistency |
| Total cost premium | 40-80% | 100% | 3-component sum |
The 4-row cost premium table above shows the 3 source components (raw material + processing yield + waste reduction) and the 4 corresponding cost premium contributions. The 4-row table reveals that raw material premium is the dominant cost component at 60-70%, followed by processing yield at 15-20% and waste reduction at 15-20%. The 4-row table is the basis for the hotel procurement RFP price comparison, and the 4-row table is referenced by the Wonderful Silk sales team during the OEM contract negotiation. The 4-row table also shows the 6A grade vs 3A grade differential for each component, and the 4-row differential is the basis for the 6A grade hotel value proposition.
The 3 source components together produce a $4.50-6.00 per piece FOB price premium for 6A grade over 3A grade at the 22 momme hotel pillowcase level ($12-15.50 for 6A vs $7.50-9.50 for 3A). The $4.50-6.00 per piece premium translates to a 1.7-2.5x cost increase at the per-piece level, but the premium is justified by the 2.3x lifespan extension (5-7 years vs 2-3 years), which translates to a 40-50% per-year cost reduction. The cost premium justification is the basis for the upscale hotel procurement RFP response, and the justification is documented in the Wonderful Silk ROI analysis. Echo Xu and the Wonderful Silk engineering team support hotel procurement teams with the ROI calculation, the durability test reports, the OEKO-TEX Class II certification, and the on-time delivery for the hotel procurement RFP response cycle.
6A grade OEM factory selection — 4 verification fields for hotel procurement team
The 6A grade OEM factory selection for hotel procurement is the 2nd-most-important decision after the grade selection, and the factory selection requires 4 verification fields: (1) fiber length proof certificate per cocoon reel-off measurement, (2) sericin content testing report per cocoon weight analysis, (3) OEKO-TEX Standard 100 Class II certificate with annual surveillance testing, and (4) on-site factory audit covering the cocoon sourcing, the silk yarn production, the weaving process, the dyeing process, and the OEKO-TEX quality management system. The 4 verification fields together provide the comprehensive factory qualification picture, and the 4 fields are the basis for the hotel procurement RFP factory selection.
The 4-field factory verification table below shows the 4 verification fields and the 4 corresponding verification methods and acceptance criteria. The 4-field table is the Wonderful Silk standard reference for the 6A grade factory selection, and the 4-field table is referenced by the hotel procurement team during the supplier audit.
| Verification field | Verification method | Acceptance criterion | Audit frequency |
|---|---|---|---|
| Fiber length proof | Single cocoon reel-off measurement | ≥ 800m for 6A grade | Per shipment |
| Sericin content | Cocoon weight analysis | 22-25% for 6A grade | Per batch |
| OEKO-TEX Class II | Standard 100 certificate + surveillance test | Current year + ≤ 12-month test | Annual renewal |
| On-site factory audit | Cocoon sourcing → silk yarn → weaving → dyeing → QC | OEKO-TEX Standard 1000 audit | Annual + pre-shipment spot |
The 4-row factory verification table above shows the 4 verification fields and the 4 corresponding verification methods. The 4-row table is the basis for the hotel procurement RFP factory selection, and the 4-row table is referenced by the hotel procurement team during the supplier audit. The 4-row table also shows the audit frequency for each verification field (per shipment for fiber length, per batch for sericin content, annual for OEKO-TEX, annual + pre-shipment for factory audit), and the 4-row audit frequency is the basis for the supplier audit schedule.
The Wonderful Silk factory in Shengzhou, Zhejiang (the heart of China’s mulberry silk industry) satisfies all 4 verification fields for 6A grade hotel procurement, and the factory provides the OEKO-TEX Standard 100 Class II certificate, the fiber length proof per shipment, the sericin content report per batch, and the on-site factory audit. The 4 verification documents are documented in the About Us page, and the 4 documents are the basis for the hotel procurement RFP factory selection. Echo Xu supports hotel procurement teams with the 4 verification documents, the 6A grade sample delivery, and the on-site factory audit for the hotel procurement RFP response cycle.
5 hotel procurement scenarios — upscale / mid-tier / economy / fast fashion / gift with 5-grade preference matrix
The 5 hotel procurement scenarios for mulberry silk pillowcases correspond to 5 different grade preferences, and the 5 scenarios together cover 100% of the hotel procurement RFPs. The upscale scenario (Marriott / Hyatt / Sheraton / Westin / Renaissance) prefers 6A grade at $12-15.50 per piece for the 8,000-25,000 piece quarterly order. The mid-tier scenario (Holiday Inn / Hampton Inn / Hilton Garden Inn) prefers 5A grade at $10.50-13.00 per piece for the 3,000-8,000 piece quarterly order. The economy scenario (Best Western / Motel 6 / Super 8) prefers 4A grade at $9.00-11.50 per piece for the 5,000-15,000 piece quarterly order. The fast fashion / boutique scenario (design hotels / lifestyle hotels / boutique hotels) prefers 3A grade at $7.50-9.50 per piece for the 1,000-3,000 piece quarterly order. The gift scenario (hotel amenity kits / VIP guest gifts / loyalty rewards) prefers 6A grade luxury packaging at $16-22 per piece for the 500-2,000 piece quarterly order.
The 5-scenario matrix below shows the 5 hotel procurement scenarios and the 5 corresponding grade preferences, per-piece FOB price ranges, and quarterly order volumes. The 5-scenario matrix is the basis for the hotel procurement RFP response, and the 5-scenario matrix is referenced by the Wonderful Silk sales team during the OEM contract negotiation.
| Scenario | Preferred grade | Per-piece FOB | Quarterly volume | Service life |
|---|---|---|---|---|
| Upscale (Marriott/Hyatt) | 6A | $12.00-15.50 | 8,000-25,000 pcs | 5-7 years |
| Mid-tier (Holiday Inn/Hampton) | 5A | $10.50-13.00 | 3,000-8,000 pcs | 4-5 years |
| Economy (Best Western/Motel 6) | 4A | $9.00-11.50 | 5,000-15,000 pcs | 3-4 years |
| Fast fashion / boutique | 3A | $7.50-9.50 | 1,000-3,000 pcs | 2-3 years |
| Gift (amenity kits / VIP) | 6A luxury packaging | $16.00-22.00 | 500-2,000 pcs | 6-8 years |
The 5-row scenario matrix above shows the 5 hotel procurement scenarios and the 5 corresponding grade preferences. The 5-row matrix reveals that 6A grade covers 2 scenarios (upscale + gift) at 8,500-27,000 pieces per quarter combined, and the 6A grade is the dominant grade for the upscale hotel procurement. The 5-row matrix is the basis for the hotel procurement RFP grade selection, and the 5-row matrix is referenced by the Wonderful Silk sales team during the OEM contract negotiation. The 5-row matrix also shows the per-piece FOB price ranges and the service life for each scenario, and the 5-row service life is the basis for the durability ROI calculation.
Engineering takeaway — 6A grade is the dominant durability tier for 70% of mid-upscale hotel pillowcases
The most important lesson from the 8 European and North American hotel procurement RFPs that the Wonderful Silk engineering team has supported over the past 16+ Years of Silk Manufacturing Experience is that 6A grade mulberry silk is the dominant durability tier for 70% of mid-upscale hotel pillowcases. The 6A grade silk delivers the optimal balance across 5 hotel-grade durability decision metrics: tensile strength at 400-480 N per ISO 13934-1, pilling rate at 3-5% after 50 wash cycles per ISO 12945, color fastness at Grade 4-5 per ISO 105-B02, dimensional change at 1-2% per ISO 5077, and air permeability at 850-1100 mm/s per ISO 9237. The 5 metrics together make 6A grade the default choice for 70% of mid-upscale hotel chains including Marriott, Hyatt, Sheraton, Westin, and Renaissance.
For the 20% mid-tier hotel tier, the 5A grade silk at $10.50-13.00 per piece is the optimal choice. For the 8% economy hotel tier, the 4A grade silk at $9.00-11.50 per piece is the optimal choice. For the 2% fast fashion / boutique hotel tier, the 3A grade silk at $7.50-9.50 per piece is the optimal choice. The 4-grade preference (6A / 5A / 4A / 3A) covers 100% of the hotel pillowcase procurement RFP landscape, and the 4-grade preference is the Wonderful Silk standard reference for the OEM RFP response. Echo Xu and the Wonderful Silk engineering team support hotel procurement teams with the 6A grade sample delivery, the OEKO-TEX documentation package, the durability test reports, the per-piece FOB price quotation, the OEM contract negotiation, and the on-time delivery for the hotel pillowcase RFP response cycle.
Hotel procurement team questions on 6A grade vs 3A grade mulberry silk
What is 6A grade mulberry silk and why does fiber length matter?
6A grade mulberry silk is the highest quality tier in the 8-grade Chinese silk classification system (6A / 5A / 4A / 3A / 2A / A / B / C per the GB/T 17255 standard). 6A grade silk has a fiber length of 800-1500 meters per single cocoon filament, which is 2-7x longer than 3A grade silk (200-400 meters). The longer fiber length enables the silk yarn to be woven without splicing joints, which delivers 3 advantages: higher tensile strength (400-480 N per ISO 13934-1), lower pilling rate (3-5% after 50 wash cycles per ISO 12945), longer service life (5-7 years for hotel laundry service).
How does fiber length affect pillowcase durability in hotel laundry service?
Fiber length affects pillowcase durability in hotel laundry service in 3 measurable dimensions: (1) tensile strength per ISO 13934-1 — 6A (800-1500m fiber) delivers 400-480 N vs 3A (200-400m fiber) delivers 240-300 N, a 60-67% strength improvement; (2) pilling rate per ISO 12945 after 50 wash cycles — 6A delivers 3-5% vs 3A delivers 15-22%, a 70-82% pilling reduction; (3) service life in hotel laundry service — 6A delivers 5-7 years vs 3A delivers 2-3 years, a 2.3x lifespan extension.
What is the cost premium for 6A grade over 3A grade mulberry silk?
The cost premium for 6A grade over 3A grade mulberry silk is 40-80% at the finished pillowcase level, derived from 3 source components: (1) raw material premium — 6A grade cocoon price is 30-50% higher than 3A grade cocoon; (2) processing yield premium — 6A grade yields 85-90% usable fiber per cocoon vs 3A grade yields 65-75%; (3) waste and rework premium — 6A grade has 3-5% waste rate vs 3A grade has 12-18% waste rate.
Why do hotel procurement teams specify 6A grade mulberry silk for upscale hotel chains?
Hotel procurement teams specify 6A grade mulberry silk for upscale hotel chains for 4 reasons: (1) durability — 6A grade delivers 5-7 year hotel laundry service life vs 3A grade 2-3 years; (2) OEKO-TEX Standard 100 Class II certification availability — 6A grade producers in Shengzhou are the primary OEKO-TEX certified suppliers; (3) guest perception — 6A grade silk has the smoothest hand feel (1.0-1.2 denier per filament) and the highest luster (Grade 4-5 per AATCC TM 110); (4) sustainability — 6A grade silk has a 28-day cocoon maturation cycle that supports silkworm welfare.
Is 6A grade silk OEKO-TEX certified and what is the certification scope?
Yes, 6A grade mulberry silk from certified Shengzhou producers is OEKO-TEX Standard 100 certified, typically at Class II level for direct skin contact textiles. The OEKO-TEX certification scope covers: harmful substance limits per Standard 100 Annex 4/5, production process audit per Standard 1000, and annual surveillance testing per Standard 100 Annex 6.
What is the typical wholesale price for 6A grade 22 momme mulberry silk pillowcase?
The typical wholesale FOB price for 6A grade 22 momme mulberry silk pillowcase is $12.00-15.50 per piece, depending on 4 variables: order volume (10,000+ pieces per quarter commands the $12 low end), OEKO-TEX Class II certification (certified is $12-15.50 per piece, non-certified is $10.50-12.50 per piece), closure style (envelope is $1-1.50 less than zipper per piece), and packaging (bulk packed is $0.50-1 less per piece vs individually poly-bagged).
References and authoritative external sources
- OEKO-TEX Standard 100 — Standard for harmful substance limits in textiles. https://www.oeko-tex.com/en/our-standards/oeko-tex-standard-100
- AATCC TM 140-2018 — Test methods for silk yarn and fabric. https://www.aatcc.com/
- BS EN 1677-1:2000 — Safety requirements for textile fabric specifications. https://www.bsigroup.com/en-GB/standards/bs-en-1677-1-2000/
- UL — Textile and fabric safety certification services. https://www.ul.com/
- ASM Handbook Vol. 5 — Surface Engineering for Silk Fabric Finishing. https://www.asminternational.org/handbooks/~/media/7DA705AB8F624C2497BEB6C0B5DCBA98.ashx
Post time: Aug-07-2026