What Information Should Buyers Provide for a Custom Fabric Quotation?

Custom fabric quotation often starts with a broad request that still needs a full technical brief before the mill can quote accurately.

When initiating a custom fabric development, understanding what information buyers should provide is essential to ensure accurate pricing and reduce sampling cycle times. A detailed Request for Quotation (RFQ) should specify fiber composition, finished fabric weight (GSM), usable width and color fastness requirements. Rather than submitting a simple image or a vague description, sourcing teams should provide a structured specification sheet detailing test methods, target tolerances and compliance certifications.

In B2B textile sourcing, a common point of friction between apparel brands and mills is a quote that changes after sampling. Sourcing teams often request a price based on minimal data, such as “80% nylon, 20% spandex, 200 GSM,” only to find that the price increases once they submit their full technical requirements. This happens because the cost of spinning fine microfibers, applying specialized color fixatives, and meeting chemical safety certifications is not included in a generic quote. Providing a complete technical brief at the start of the RFQ process ensures that the initial quotation is accurate and realistic.

The Technical Brief: Crucial Specifications Sourcing Teams Overlook

When preparing a fabric RFQ, sourcing managers often overlook parameters that directly affect knitting and finishing costs. The most common omission is the difference between total width and usable width. Circular-knitted and warp-knitted fabrics are finished with a pinned edge (selvedge) to hold them on the stenter frame. During finishing, this selvedge is often gummed and pinned, making it unusable for garment cutting. The total width includes this selvedge, while the usable width is the actual cuttable fabric surface, typically 3cm to 5cm more focused. If the brand’s cutting room layouts assume a width of 150cm but the fabric’s usable width is only 146cm, the cutting yield will drop, increasing garment manufacturing waste.

Another critical variable is the dimensional stability requirement. Sourcing teams must define the target wash shrinkage under ISO 5077 dimensional change standards. If a brand expects a high-performance activewear fabric to maintain a shrinkage tolerance of ≤ ± 3% rather than the standard ± 5%, the mill must utilize higher-grade yarns, adjust the stenter overfeed rate, and run the fabric through a mechanical compactor. This additional processing increases machine time and energy costs, which must be factored into the initial quotation.

Sourcing Checklist: Fabric Tech Pack RFQ Requirements

The table below provides a checklist of the technical parameters that sourcing teams should compile before requesting a custom fabric quotation.

RFQ Parameter Category	Required Technical Data Points	Standard Test Methods	Why it Affects Mill Costing	Preferred Unit
Physical Properties	Fiber composition, finished GSM, usable width	ASTM D3776 (GSM), ASTM D1777 (Thickness)	Determines raw material weight and machine setup	%, GSM, Centimeters (cm)
Dimensional Stability	Washing shrinkage (Length/Width), spirality	ISO 5077, AATCC TM135	Determines stenter overfeed and compaction requirements	% change
Color Fastness	Fastness to washing, light, perspiration, rubbing	ISO 105-C06 (Wash), ISO 105-X12 (Rub)	Determines dyestuff selection and fixing agent use	Grade (1 – 5)
Compliance & Safety	Chemical restrictions, recycled certification	Oeko-Tex Standard 100, GRS SC/TC	Requires certified raw materials and auditing	SC/TC verification
Commercial Terms	Target delivery date, payment terms, MOQ	ISO 9001 lead time tracking	Determines dye vat size and production planning	Meters / Kilograms

Compliance and Certifications: GRS and Oeko-Tex Requirements

Chemical safety and environmental certifications are key cost drivers in modern textile manufacturing. Sourcing teams must state their compliance expectations during the RFQ stage. For intimate apparel and underwear, the fabric must meet the Oeko-Tex Standard 100 Class I guidelines. This standard restricts free formaldehyde to less than 16 ppm and prohibits carcinogenic dyes. Meeting this standard requires the mill to source certified raw materials and use eco-friendly scouring and fixing agents, which can increase chemical costs by 5% to 10%. Additionally, the dyehouse must run extensive washing cycles to clear chemical residues, which increases water and electricity consumption.

For recycled nylon or polyester orders, brands should require the mill to be certified under the Global Recycled Standard (GRS). A GRS-certified mill must maintain strict separation between virgin and recycled raw materials, from yarn warehousing to final packing. Sourcing teams should request the mill’s GRS Scope Certificate (SC) during the RFQ phase and ensure that the mill can provide Transaction Certificates (TCs) for each bulk shipment. Auditing these compliance credentials early protects brands from greenwashing claims and ensures the product’s origin is verified.

Sampling Benchmarks: Physical Swatches vs. Digital Spec Sheets

While a digital specification sheet (detailing GSM, composition, and width) is useful, it cannot describe subjective tactile properties like softness, drape, and surface hairiness. Nylon-spandex fabrics, for example, can be finished using silicone softeners, hydrophilic agents, or brushing to create different handfeels. Relying on written specifications alone often leads to multiple rounds of sampling, as the mill attempts to guess the buyer’s desired handfeel.

To reduce this sampling cycle, sourcing managers should send a physical reference swatch (minimum 10cm x 10cm) to the mill. Fabric engineers can perform yarn count tests, composition analysis, and density checks on the physical sample. This allows the mill to identify the exact knitting structure and finishing route, enabling them to match the handfeel and drape in the first lab-dip round, reducing the sampling cycle from several weeks to just a few days.

B2B Sourcing FAQ: 3 Critical Questions Sourcing Managers Ask the Mill

How does specifying a color-matching light source (e.g., D65 vs. CWF) affect the cost of custom-dyed fabrics?

Different retail markets utilize different lighting standards. If a brand sells garments in stores that use cool white fluorescent (CWF) lighting, the dyes must be formulated to match the color standard under CWF. If the mill matches the color under standard daylight (D65) without checking CWF, the fabric will exhibit metamerism—appearing as a different shade in the store than in the design room. The mill must formulate a specific dyestuff combination to match under all required light sources, which may increase color-matching costs.

What is the standard bulk delivery weight tolerance, and how should it be written into the B2B purchase contract?

Textile manufacturing is subject to mechanical variables. The international standard for fabric weight tolerance is ± 5% under ASTM D3887 guidelines. Sourcing teams should write this tolerance into their purchase contracts. For example, if a brand orders 10,000 meters of a 200 GSM fabric, the mill is considered to have fulfilled the order if the delivered weight remains between 190 GSM and 210 GSM, preventing disputes over minor weight variations.

Why does the fabric mill require a higher Minimum Order Quantity (MOQ) for custom-dyed spandex blends?

Dyeing fabric is performed in industrial dye vats (jet dyeing machines) that have fixed capacity limits, such as 300kg or 500kg per vat. If the mill runs a custom color in a 500kg vat with only 100kg of fabric, the liquor ratio is disrupted, resulting in uneven color and high chemical waste. To cover the fixed cost of heating the vat and running the water, the mill sets the MOQ to match the capacity of their smallest dye vat, which is typically 300kg to 500kg per color.

For more details on dimensional stability, refer to the ISO 5077 guidelines. For chemical safety standards, review the Oeko-Tex Standard 100 specifications, and for quality management guidelines, consult the ISO 9001 standards.

Changle Textile specializes in custom fabric developments, offering high-performance warp-knitted tricots and circular-knitted meshes under strict quality controls. B2B buyers can review our underwear fabrics in our underwear fabric collections or explore our lightweight meshes in our mesh fabric catalog. To submit your technical spec sheet and request a custom quotation, please contact our engineers through our inquiry page.