Phone/whatsapp:+86177-2151-9382
Physical address:
Yangshanfan Road Intersection, Chengdong Village, Hengcun Town, Tonglu County, Hangzhou City, Zhejiang. China
Email address:
Quote@weaveessence.com
Tech Hub — Performance Testing & Quality Standards
Colour Fastness Standards for Scarves — ISO 105 Grey Scale Grade Guide & Factory Application
Technical reference covering ISO 105-C06 wash fastness, ISO 105-X12 rubbing fastness, ISO 105-B02 light fastness and ISO 105-E01 water fastness, with Grey Scale rating interpretation, fibre-by-dye-class performance data and buyer specification guidance.
Data verified as of April 2026 — ISO 105-C06:2010, ISO 105-X12:2016, ISO 105-B02:2014, ISO 105-E01:2013
Key Takeaways
What Scarf Buyers Need to Know About Colour Fastness
- Colour fastness is rated on a Grey Scale Grade 1–5: Grade 5 = negligible change (best), Grade 1 = severe colour loss or staining (commercially unacceptable)
- ISO 105-C06 (wash fastness) is the most commonly required test for EU and US retail; Grade 4 minimum to colour change is the standard retail threshold
- Rubbing fastness (ISO 105-X12) must be specified separately — it is not included in wash fastness testing and addresses a different failure mode: dye transfer to adjacent surfaces
- Fibre type and dye class together determine achievable fastness grade; acrylic and polyester with disperse dyes consistently reach Grade 4–5, while natural fibres require careful dye class selection to reach Grade 4
- Light fastness (ISO 105-B02) is a separate, time-intensive test — typically only needed for scarves intended for window display, outdoor, or prolonged UV-exposure applications
What Colour Fastness Tests Measure
Colour fastness describes a textile’s resistance to colour change or dye transfer when subjected to specific conditions — washing, rubbing, light exposure, or water immersion. It is not a single property; each type of fastness addresses a distinct failure mechanism and is measured by a separate standard. A fabric may have excellent wash fastness but poor rubbing fastness, or vice versa, depending on the dye class and fibre combination used.
All colour fastness tests produce results rated on the ISO Grey Scale: a standardised set of paired grey chips representing defined levels of colour difference (for assessing colour change) or staining (for assessing dye transfer to adjacent fabrics). The scale runs from Grade 5 (negligible change) to Grade 1 (severe change). Half grades (e.g., Grade 3–4) are commonly reported when the result falls between two reference chips. Two separate assessments are typically recorded: colour change of the test specimen, and staining of the adjacent multifibre strip.
For scarf procurement, the four most relevant test types are: wash fastness (the most commonly specified), rubbing fastness (often overlooked in buying specifications), light fastness (relevant only for specific end uses), and water fastness (relevant for outdoor or active-use scarves). Each should be evaluated independently against the specific end-use requirements of the programme.
Standard Scope and Test Methods
Four ISO 105 series standards cover the primary colour fastness requirements for scarves. Each test method addresses a distinct end-use condition.
| Standard | Full Name | Test Condition | What It Assesses | Scarf Relevance |
|---|---|---|---|---|
| ISO 105-C06:2010 | Colour Fastness to Domestic and Commercial Laundering | Simulated machine wash at defined temperature and detergent concentration (A1S / B1S / C1S / D1S cycles) | Colour change of test specimen; staining to adjacent multifibre strip | Primary standard — required for all washable retail scarves; EU and US retail default |
| ISO 105-X12:2016 | Colour Fastness to Rubbing (Crocking) | Dry and wet white cotton rubbing cloth applied under defined load for set number of strokes | Dye transfer from test specimen to rubbing cloth (dry crocking and wet crocking assessed separately) | Critical for dark-coloured scarves and natural fibres; must be specified alongside wash fastness |
| ISO 105-B02:2014 | Colour Fastness to Artificial Light (Xenon Arc Fading Lamp) | Exposure to filtered xenon arc lamp simulating daylight spectrum; rated against Blue Wool reference scale | Colour fading under sustained UV/light exposure; rated on Blue Wool 1–8 scale (not Grey Scale) | Niche requirement — relevant for display scarves, outdoor wear, or buyer programmes specifying light fastness |
| ISO 105-E01:2013 | Colour Fastness to Water | Immersion at 37°C for 4 hours under light pressure with adjacent multifibre fabric | Colour change and staining under sustained water contact (simulates rain or perspiration) | Supplementary test for outdoor, sportswear-adjacent or active-use scarf programmes |
Grey Scale Rating — Grade 1 to 5 Interpretation
The ISO Grey Scale is the universal rating instrument for colour fastness assessment. Two scales exist: one for colour change (change in shade of the test specimen) and one for staining (colour transferred to the adjacent multifibre strip). Both are graded 1–5.
| Grade | Assessment (Colour Change) | Assessment (Staining) | Market Implication |
|---|---|---|---|
| 5 | Negligible or no colour change from original standard | Negligible or no staining on adjacent fabric | Suitable for all markets including luxury; achievable with optimised dye-fibre systems |
| 4 | Slight colour change; perceptible only on close examination | Slight staining, not commercially significant | Standard minimum for EU and US retail export; required by most fashion buying specifications |
| 3 | Moderate colour change; noticeable on direct comparison | Moderate staining; visible on white or light adjacent fabrics | Borderline — some promotional programmes accept Grade 3, but retail buyers will flag; re-dyeing or dye class change typically required |
| 2 | Considerable colour change; visually apparent | Considerable staining; significant risk of garment staining in end use | Not acceptable for retail or commercial programmes; industrial or non-washable end uses only |
| 1 | Severe colour change; dramatic fading or shade shift | Severe staining; heavy dye transfer to adjacent fabric | Complete failure — dyeing process must be fully reviewed before re-submission |
Fibre and Dye Class Performance Reference
Expected colour fastness grades vary significantly by fibre type and dye class. These ranges reflect typical factory production outcomes under standard dyeing conditions — not theoretical maximums achievable with optimised laboratory dyeing.
| Fibre | Common Dye Class | Wash Fastness ISO 105-C06 |
Rub Fastness Dry / Wet ISO 105-X12 |
Water Fastness ISO 105-E01 |
Typical Performance |
|---|---|---|---|---|---|
| Wool | Acid dye (1:2 metal complex) | Grade 3–4 | 3–4 / 2–3 | 3–4 | Good |
| Cashmere | Acid dye (1:2 metal complex) | Grade 3–4 | 3–4 / 2–3 | 3–4 | Good |
| Acrylic | Basic (cationic) dye | Grade 4–5 | 4–5 / 4 | 4–5 | Excellent |
| Polyester | Disperse dye | Grade 4–5 | 4–5 / 4 | 4–5 | Excellent |
| Cotton | Reactive dye | Grade 4 | 4 / 3–4 | 4 | Good |
| Cotton | Direct dye | Grade 2–3 | 2–3 / 2 | 2–3 | Poor — avoid for retail |
| Nylon / Polyamide | Acid dye | Grade 3–4 | 3–4 / 2–3 | 3–4 | Moderate |
| Viscose / Rayon | Reactive dye | Grade 3–4 | 3 / 2–3 | 3 | Moderate — wet rub critical |
Factory Application — How Colour Fastness Is Controlled in Scarf Production
Colour fastness in bulk scarf production is primarily controlled at three points: dye class selection, dyeing cycle parameters, and post-dyeing fixation treatment. Dye class selection is the most important variable — the wrong dye class for a given fibre will produce poor fastness regardless of how well the dyeing cycle is executed. For example, direct dyes on cotton produce Grade 2–3 wash fastness irrespective of dyeing precision; only by switching to reactive dyes can Grade 4 be reliably achieved. A technically competent factory will specify dye class in the colour development brief, not leave it to internal discretion.
Deep shades consistently present greater fastness challenges than pale or mid-tones. Navy, black, burgundy and dark forest green require higher dye concentrations to achieve depth of colour, and at high concentrations a proportion of dye molecules remain unfixed within the fibre structure. These unfixed molecules are the source of bleeding, staining and crocking failure. Factories managing this risk use extended fixation time, fixative auxiliaries, and thorough after-washing to remove unfixed dye — but buyers specifying dark colours should factor in higher dyeing cost and the possibility of a lower achievable fastness ceiling. Specifying Grade 4–5 on a navy wool scarf at minimum cost will often lead to one of two outcomes: either the factory reduces dye concentration (resulting in an off-shade) or cuts fixation time (resulting in poor wash fastness).
At WeaveEssence, colour fastness testing is integrated into the pre-production approval process. Lab dip approval is conditional on achieving specified fastness grades on a 10cm × 10cm swatch, and bulk production is tested against the same standard before dispatch. For programmes specifying wash fastness Grade 4 minimum, we use 1:2 metal-complex acid dyes for wool and cashmere, reactive dyes for cotton content, and basic dyes for acrylic. Rubbing fastness is routinely tested alongside wash fastness on all bulk orders — not as an afterthought but as a standard QC gate.
Common Buyer Misunderstanding
Misconception
“Wash fastness covers all colour fastness — if it passes ISO 105-C06, the scarf is colour-safe.”
The Technical RealityWash fastness (ISO 105-C06) and rubbing fastness (ISO 105-X12) are independent tests measuring completely different failure modes. A fabric that achieves Grade 4 wash fastness can simultaneously have Grade 2 wet rubbing fastness — meaning the dye bleeds onto skin or clothing under perspiration or damp conditions. This is a common source of end-consumer complaints for dark-coloured wool and viscose scarves, particularly in humid climates or when worn against light-coloured garments. Light fastness (ISO 105-B02) is a third, entirely separate test. Buying specifications that reference only wash fastness without specifying rubbing fastness leave a significant quality gap that will not be caught by standard QC unless explicitly required.
Related Technical Parameters
Colour fastness performance is linked to and influenced by these production and specification variables.
Dye Class & Fibre Affinity
The chemical bond between dye molecule and fibre determines maximum achievable fastness. Covalent bonds (reactive/disperse dyes) are more permanent than ionic bonds (acid/direct dyes). Dye class must match fibre chemistry — substituting dye class to reduce cost typically reduces fastness grade.
Dye Concentration (Depth of Shade)
Deep shades require higher dye concentrations. At high concentrations, unfixed dye molecules remain in the fibre and contribute to bleeding and crocking. Dark colours have a lower achievable fastness ceiling than pale shades — buyers should factor this into specifications for navy, black or burgundy scarves.
Fixation Temperature & Time
Insufficient fixation temperature or time during dyeing leaves dye molecules unfixed in the fibre. This is the most common cause of wash fastness failure in bulk production. Fixation parameters must be validated during colour development and maintained consistently in bulk runs.
After-Washing & Soaping
Post-dyeing soaping removes surface and unfixed dye before the fabric reaches the garment stage. Inadequate after-washing is a primary cause of poor rubbing fastness and initial wash bleed. This step should not be abbreviated to save dyeing time — it directly determines crocking grade.
Fixative Auxiliaries
Cationic fixative agents can improve wash and wet rubbing fastness for reactive-dyed cotton by up to 0.5–1 grade. However, they are a supplement, not a substitute for correct dye class selection and fixation. Overuse can alter shade slightly and reduce light fastness.
Multifibre Staining Assessment
ISO 105-C06 tests include a multifibre strip (wool, acrylic, polyester, nylon, cotton, viscose) adjacent to the test specimen. Each fibre type in the strip is assessed for staining separately. Reporting the lowest-grade staining component is standard practice — buyers should request the full multifibre breakdown, not a single staining figure.
When to Require Colour Fastness Test Reports
Not every programme requires all four colour fastness tests. The table below provides a practical framework for specifying which tests to require based on end use and product type.
Always Require
- ISO 105-C06 (wash fastness, Grade 4+ colour change) — all washable retail scarves
- ISO 105-X12 dry crocking (Grade 4+) — all colours, all fibres
- ISO 105-X12 wet crocking (Grade 3+) — dark colours, natural fibres, viscose
- Both wash fastness and rubbing fastness on same lab dip swatch before bulk approval
- Full multifibre staining breakdown, not a single composite staining grade
Situational or Lower Priority
- ISO 105-B02 (light fastness) — only for window display, outdoor use or UV-exposure programmes
- ISO 105-E01 (water fastness) — only for outdoor, active-use or sportswear-adjacent scarves
- Wet crocking on pale acrylic or polyester — typically achieves Grade 4 without additional testing effort
- Re-testing on reorder if dye recipe and fibre batch are identical and initial result was Grade 4–5
Frequently Asked Questions
What colour fastness grade should I require for EU retail scarves?
For EU retail programmes, Grade 4 minimum to ISO 105-C06 is the standard threshold for colour change; Grade 3–4 is generally accepted for staining on the multifibre strip. Premium fashion and department store buyers typically specify Grade 4–5. Grade 3 alone is borderline and will likely trigger a re-specification request.
What is the difference between dry and wet crocking, and which matters more for scarves?
Dry crocking measures dye transfer to a dry rubbing cloth; wet crocking uses a moistened cloth. Wet crocking grades are almost always lower, as water acts as a medium facilitating dye migration. Both are relevant for scarves — dry crocking for normal wear, wet crocking for perspiration or damp conditions. Both should be specified independently.
Can colour fastness be improved after the fabric is already dyed?
After-treatment fixative agents can improve wash and wet rubbing fastness by approximately 0.5–1 grade for reactive-dyed cotton and direct-dyed fabrics. However, if a fabric fails colour fastness, the root cause is almost always dye class, concentration, fixation temperature or time — these must be corrected in the dyeing process, not patched with after-treatments.
Why do dark colours test lower in colour fastness than light colours?
Dark shades require higher dye concentrations. At high concentrations, a portion of dye molecules remain unfixed within the fibre — these unfixed molecules bleed, stain and rub off during testing. Navy, black and burgundy are consistently more challenging to achieve at Grade 4+ than pale tones; buyers specifying dark colours should discuss this with the factory during colour development.
How does batch-to-batch colour consistency relate to colour fastness testing?
- Colour consistency (Delta-E between batches) and colour fastness (resistance to change during use) are different properties measured by different tests — a fabric can have consistent shade matching but poor wash fastness, or vice versa
- Delta-E measures the visual difference between two colour samples at a single point in time using spectrophotometry; colour fastness measures how much a single sample changes after exposure to a defined stress condition
- For reorder programmes, both should be specified: a Delta-E tolerance (typically ≤1.0 against the approved shade standard) and a minimum colour fastness grade — specifying only one without the other leaves a gap in quality requirement
- A factory achieving excellent batch-to-batch consistency but poor fastness is using a consistent but incorrectly specified dyeing process — consistency amplifies, not conceals, a fastness problem
Standards & Technical References
- ISO 105-C06:2010 — Textiles: Tests for colour fastness — Part C06: Colour fastness to domestic and commercial laundering
- ISO 105-X12:2016 — Textiles: Tests for colour fastness — Part X12: Colour fastness to rubbing
- ISO 105-B02:2014 — Textiles: Tests for colour fastness — Part B02: Colour fastness to artificial light — Xenon arc fading lamp test
- ISO 105-E01:2013 — Textiles: Tests for colour fastness — Part E01: Colour fastness to water
- ISO 105-A02:1993 — Textiles: Tests for colour fastness — Part A02: Grey scale for assessing change in colour
- ISO 105-A03:1993 — Textiles: Tests for colour fastness — Part A03: Grey scale for assessing staining
- AATCC Test Methods — American Association of Textile Chemists and Colorists: AATCC 61 (accelerated laundering), AATCC 8 (dry crocking), AATCC 16 (light fastness) — US-market equivalent methods to the ISO 105 series; visit aatcc.org for the current method index
- Colour fastness test reports are accepted from accredited third-party laboratories. Bureau Veritas and TÜV Rheinland maintain specialist textile testing divisions with ISO 105 test capability; both issue reports recognised across EU, US, and Asian retail buying programmes.
Related Technical Guides
Explore related standards and performance parameters referenced in scarf buying specifications.