Fiber Yarn Testing Service for Global Textile and Technical Fiber Compliance
As an ISO/IEC 17025 accredited laboratory, we deliver a comprehensive Fiber Yarn Testing Service that verifies the physical structure, mechanical performance, chemical composition, colorfastness, and regulatory compliance of natural, synthetic, blended, and high-performance yarns. Our Fiber Yarn Testing Service supports manufacturers and exporters who must demonstrate conformity to ISO, ASTM, EN, AATCC, and regional textile regulations across the European Union, North America, the Middle East, and Asia. Every test is performed under our CNAS-accredited quality system, producing reports accepted by notified bodies, brand owners, and procurement teams worldwide.
Product Samples We Regularly Test in Our Fiber Yarn Testing Service
- Natural fiber yarns — cotton, wool, silk, linen, hemp, ramie, and cashmere yarns for apparel, home textiles, and industrial applications
- Synthetic filament and spun yarns — polyester, nylon, acrylic, polypropylene, spandex, and aramid yarns in flat, textured, and bulked forms
- Blended and melange yarns — cotton-polyester, wool-acrylic, nylon-cotton, and other intimate blends for performance and aesthetic effects
- High-performance and technical yarns — carbon fiber, glass fiber, basalt, PBO, Vectran, and UHMWPE yarns for composites and protective systems
- Specialty and functional yarns — conductive, flame-retardant, anti-bacterial, UV-resistant, and bio-based yarns
- Textured and covered yarns — air-jet textured, false-twist textured, core-spun, and wrapped yarn structures
- Recycled and sustainable yarns — regenerated cotton, recycled polyester, and bio-based filament yarns for circular economy programs
Fiber Yarn Testing Service for Natural Fiber Yarns
- Linear density and yarn count per ISO 2060 and ASTM D1907 — the mass per unit length is measured in tex, dtex, or cotton count to verify the declared yarn number and to ensure consistency in weaving, knitting, and finishing.
- Twist direction and twist per unit length per ISO 2061 and ASTM D1422 — the number of turns per meter or inch and the twist direction are determined to verify yarn structure, strength, and performance in downstream processing.
- Tensile strength and elongation at break per ISO 2062 and ASTM D2256 — the yarn is pulled to failure to measure breaking force, tenacity, and elongation, ensuring the natural fiber yarn withstands spinning, weaving, and knitting tensions.
- Evenness and irregularity per ASTM D1425 and ISO 16549 — capacitance or optical evenness testers measure the coefficient of variation and thin and thick places, verifying consistent yarn diameter and appearance.
- Hairiness and fiber protruding per internal validated protocols — the number and length of protruding fibers are measured to predict pilling, processing efficiency, and fabric hand.
- Moisture regain and commercial mass per ISO 6741 and ASTM D2654 — the moisture content is determined to calculate the correct commercial weight and to verify proper conditioning before shipment.
- Fiber composition and blend ratio per ISO 1833 and AATCC 20 — quantitative chemical or microscopic analysis confirms the declared fiber content, including the identification of any undeclared blends or contaminants.
Fiber Yarn Testing Service for Synthetic and Blended Yarns
- Linear density and denier per ISO 2060 and ASTM D1577 — the yarn count is measured for filament and spun synthetic yarns to verify the specified denier, dtex, or tex and to ensure uniform downstream processing.
- Tensile properties and modulus per ISO 2062 and ASTM D2256 — breaking force, tenacity, elongation, and initial modulus are measured to verify the mechanical performance of polyester, nylon, acrylic, and blended yarns.
- Thermal shrinkage and boiling water shrinkage per ISO 250 and ASTM D2259 — the dimensional change after heat or boiling water exposure is measured to predict yarn stability during dyeing, heat setting, and finishing.
- Oil and finish content per ASTM D2257 and ISO 2100 — the amount of spin finish, lubricant, or antistatic agent on the yarn is quantified to ensure proper processing performance and to prevent static or friction issues.
- Interfilament cohesion and network stability for textured yarns — the degree of interlace and the stability of the yarn structure are measured to verify consistent unwinding, weaving, and knitting behavior.
- Color fastness to washing, rubbing, light, and perspiration per ISO 105 and AATCC methods — dyed synthetic and blended yarns are tested to ensure the color does not bleed, fade, or transfer during downstream processing and end use.
- Chemical resistance and solvent sensitivity per ISO 175 and ASTM D543 — the yarn is exposed to common processing chemicals and cleaning agents to verify compatibility with finishing and maintenance procedures.
Fiber Yarn Testing Service for High-Performance and Technical Yarns
- Tensile strength, modulus, and elongation per ISO 2062 and ASTM D2256 — high-modulus yarns such as aramid, carbon, glass, and UHMWPE are tested to verify the specified strength and stiffness for composite and protective applications.
- Linear density and filament diameter per ISO 1889 and ASTM D578 — the yarn count and individual filament diameter are measured to confirm the material specification and to support composite design calculations.
- Thermal stability and decomposition onset per ASTM E1131 and ISO 11357-3 — thermogravimetric analysis determines the maximum continuous service temperature and the thermal decomposition behavior of high-performance yarns.
- Electrical conductivity and resistivity per ASTM D257 and IEC 60093 — conductive and anti-static yarns are tested to verify the specified electrical performance for shielding, grounding, and static dissipation applications.
- Chemical resistance to acids, alkalis, and organic solvents per ISO 175 and ASTM D543 — the yarn is immersed in aggressive chemicals to verify compatibility with the intended service environment.
- UV and xenon-arc accelerated weathering per ASTM G155 and ISO 4892-2 — the yarn is exposed to simulated sunlight and moisture cycles to evaluate color retention, strength retention, and surface degradation after outdoor exposure.
- Flame resistance and limiting oxygen index per ISO 4589-2 and ASTM D2863 — the intrinsic fire resistance of flame-retardant and high-performance yarns is measured to rank their performance in protective and transportation applications.
Fiber Yarn Testing Service for Color, Appearance, and Finishing Performance
- Color measurement and color difference per ISO 7724 and ASTM E308 — CIE L*a*b* coordinates and delta E values are determined to verify batch-to-batch color consistency and to match brand standards.
- Color fastness to washing, water, perspiration, and dry cleaning per ISO 105 and AATCC methods — dyed yarns are tested to ensure the color does not bleed or transfer during garment manufacturing and consumer care.
- Color fastness to light and xenon arc per ISO 105-B02 and AATCC 16 — the resistance to fading under artificial and natural light is rated against the blue wool scale for indoor and outdoor applications.
- Appearance after laundering and dimensional stability per ISO 6330 and AATCC 135 — yarns and knitted or woven specimens are washed and dried, and the changes in appearance, shrinkage, and texture are evaluated.
- Pilling and abrasion resistance per ISO 12945-2 and ASTM D4966 — the tendency of the yarn to form pills and fuzz under rubbing is measured to predict fabric appearance retention.
- Visual defect inspection under D65 illumination — systematic examination for color streaks, contamination, slubs, and finish defects against agreed acceptance criteria and master reference samples.
Fiber Yarn Testing Service for Chemical Safety and Restricted Substances
- RoHS compliance per IEC 62321 and EU Directive 2011/65/EU — quantitative screening for lead, mercury, cadmium, hexavalent chromium, PBBs, and PBDEs in the yarn, dyes, and finishes.
- REACH Annex XVII and SVHC screening — targeted analysis of Substances of Very High Concern including phthalate plasticizers, organotin stabilizers, and restricted aromatic amines.
- Azo colorants and restricted amines per EN 14362-1 — the dyed yarn is screened for banned azo dyes that could release carcinogenic amines, ensuring safe skin contact.
- Formaldehyde content per ISO 14184-1 and EN 16516 — the release of formaldehyde from finishing agents is measured to verify compliance with indoor air quality and consumer safety regulations.
- Heavy metals and extractable elements per EN 71-3 and ASTM F963 — for yarns used in children's products and toys, the migration of antimony, arsenic, barium, cadmium, chromium, lead, mercury, and selenium is tested.
- Polycyclic aromatic hydrocarbons per AfPS GS 2019:01 PAK — for carbon-black-pigmented or dark-colored yarns, the 15 restricted PAHs are extracted and quantified.
- Halogen content by combustion ion chromatography per EN 14582 — the total fluorine, chlorine, bromine, and iodine content is measured to support halogen-free declarations and environmentally conscious manufacturing.
Report Recognition and ISO/IEC 17025 Compliance
Every test method described in this Fiber Yarn Testing Service is covered by our ISO/IEC 17025 scope of accreditation. Our technical reports and certificates of analysis are accepted by European notified bodies for textiles and consumer products, by North American brand owners and retailers referencing ASTM and AATCC standards, and by customs and procurement authorities across the Middle East, Australia, and Asia. Whether you require a complete qualification dossier for a new yarn product, a batch release inspection for an export shipment, or a root cause failure analysis of a yarn performance issue, our laboratory provides the measurement accuracy and textile fiber expertise that the global yarn and textile industry demands.
