What Fabric and Material Testing Standards Does Ginwenwear Apply?

Ginwenwear conducts fabric and material testing at two stages: incoming material inspection before production and final product testing on finished jackets. Testing covers fabric physical properties, colorfastness, dimensional stability, and safety certification compliance. All testing follows ASTM and ISO standard methods where applicable. Tests are conducted in Ginwenwear's on-site testing lab, and key results are shared with the buyer before production approval. Third-party lab testing (SGS, Intertek, Bureau Veritas) can be arranged at the buyer's request and cost.

Fabric Physical Testing

Each incoming fabric lot is tested for fabric weight (grams per square meter, GSM) using ASTM D3776 to verify against the specified weight with a tolerance of plus or minus 5%. Fabric construction (thread count and weave type) is verified under a magnifying glass. Tensile strength is tested per ASTM D5034 (strip method) for woven fabrics and ASTM D5035 (grab method) for knitted fabrics if applicable. Tear strength is tested per ASTM D1424 (Elmendorf method) for woven shell fabrics. Pilling resistance is tested per ASTM D4970 (Martindale method) or ASTM D3512 (random tumble method) depending on fabric type.

Colorfastness Testing

Colorfastness to washing is tested per AATCC 61 (2A or 3A method) with a minimum acceptable grade of 4 (on a 1-5 scale, where 5 is best). Colorfastness to light (UV exposure) is tested per AATCC 16.3 with a minimum acceptable grade of 4 after 20 hours of exposure. Colorfastness to crocking (rubbing) is tested per AATCC 8 (dry and wet) with a minimum dry grade of 4 and wet grade of 3. Colorfastness to perspiration is tested per AATCC 15 with a minimum grade of 3.5. Shade variation across fabric rolls within the same dye lot is visually assessed under D65 daylight standard lighting using a 4-point scale. Rolls exceeding a half-grade shade difference from the approved standard are segregated and must be cut separately.

Dimensional Stability (Shrinkage)

Fabric shrinkage is tested per AATCC 135 (for woven fabrics) or AATCC 150 (for knitted fabrics). Maximum acceptable shrinkage: 3% in length and 3% in width for woven jacket shell fabrics. For linings, maximum acceptable shrinkage is 3% in both directions. If the lining fabric shrinks at a different rate than the shell fabric, Ginwenwear's pattern engineering team adjusts the pattern to account for the differential, ensuring the finished jacket maintains its shape after washing. Shrinkage test results are included in the pre-production approval package sent to the buyer.

Fabric Safety Testing

All fabrics used in Ginwenwear's production are sourced from OEKO-TEX Standard 100 certified mills. For children's jacket orders (age 4-16), Product Class I fabric certification is preferred, and additional phthalate testing (per CPSC requirements for the US market) is conducted. Formaldehyde content is tested per ISO 14184-1 with a maximum of 75 ppm for fabric with direct skin contact. For down jackets, fill power is tested per IDFB (International Down and Feather Bureau) methods, and down composition (percentage of down to feather) is verified against the specification sheet. RDS certification documents are reviewed for traceability.

Hardware and Trim Testing

Zippers are tested for 10,000 open-close cycles minimum per ASTM D2061 for metal zippers and ASTM D2062 for nylon zippers. Buttons and snaps are tested for pull-off strength per ASTM D4846, with minimum pull strength varying by button size and type (typically 5-15 kg for plastic buttons, 8-20 kg for metal buttons). Hook and loop fasteners (Velcro) are tested for shear strength and peel strength per ASTM D5169 and ASTM D5170. Thread is verified for fiber content and ply count against the specification.

Testing Limitations

Ginwenwear's on-site lab can conduct standard fabric physical tests and colorfastness tests. Specialized tests such as hydrostatic head (waterproof rating), breathability (MVTR), flame retardancy (ASTM D6413 or NFPA standards), and detailed chemical analysis require third-party lab testing. Buyers requiring these specialized tests should specify them at quotation stage. Third-party testing typically adds 7-14 working days and costs $150-$500 per test depending on the test type and laboratory. Ginwenwear provides fabric samples for testing upon request before bulk production begins.

Submit your fabric specifications for testing confirmation. Contact our QC team for specific test method inquiries.