DIRECT ANSWER
INDUSTRIAL WASH TESTING FOR WORKWEAR: ISO 15797 VS ISO 6330
Use ISO 15797 when the workwear is intended for industrial laundering and the selected procedure is suitable for the fabric, garment and real laundry route. Use ISO 6330 when the requirement is domestic washing and drying for textile testing. Do not approve a fabric from a temperature label such as ‘60°C’ alone. The purchase specification should name the procedure, washer and drying or finishing route, cycle count, specimen state, dimensional-change limit, appearance checks, retained performance requirements and final evidence. For industrially laundered workwear, compatibility with the intended real laundry process may also need confirmation before bulk approval.
KEY TERMS
WHAT THE REQUIREMENT ACTUALLY MEANS
- Industrial laundering
- A commercial workwear care route using defined washing and drying or finishing conditions. ISO 15797 provides laboratory-scale procedures that simulate relevant industrial-laundry effects.
- Domestic washing test
- A controlled washing and drying procedure under ISO 6330 for fabrics, garments or textile articles intended to be evaluated under domestic-care conditions.
- Dimensional change
- The percentage change in measured dimensions after a specified treatment, determined from marked and measured specimens rather than from an informal visual estimate.
- After-care retention
- The agreed property or appearance remaining after the named wash, dry or finishing procedure and cycle count.
Choose the laundering standard from the real service route
Begin with who will wash the finished garment and how. ISO 15797:2017 is intended for evaluating workwear, including some PPE garments where appropriate, that will be industrially laundered. It uses defined procedures to simulate industrial washing and drying or finishing, but it is not an operating manual for a commercial laundry. ISO 6330:2021 specifies domestic washing and drying procedures for textile testing. A domestic procedure should not be used as evidence of industrial-laundry suitability merely because the water temperature looks similar. ISO also notes that final compatibility may need evaluation in the actual industrial equipment and process intended for the garment.
- Named domestic or industrial care route
- Fabric, garment and PPE scope
- Selected washing and drying or finishing procedure
- Real-laundry confirmation when the project requires it
Specify the complete care cycle, not only 40°C or 60°C
Temperature is only one input. The buyer should identify the standard and edition, exact washing procedure, detergent, ballast or load condition where applicable, drying or tunnel-finishing route, and number of cycles before assessment. ISO 6330 states that a complete domestic test combines washing and drying, and that machine, detergent and dryer parameters can affect results. ISO 15797 likewise offers different washing and drying or finishing routes; not every route needs to be used. Select the procedure that represents the fabric composition, garment construction and intended service, then keep it constant across sample approval, supplier comparison and bulk verification.
- Standard, edition and procedure code
- Machine, detergent and load condition
- Drying or finishing route
- Cycle count and assessment interval
Measure dimensional change with a controlled specimen method
Shrinkage should be written as a directional acceptance requirement, not as a general promise that the fabric is ‘pre-shrunk.’ ISO 3759:2011 covers preparation, marking and measurement of fabric specimens, garments and fabric assemblies used for dimensional-change testing. ISO 5077:2007 covers calculation of dimensional change after an appropriate specified washing and drying combination. State whether the result applies to fabric or finished garments, identify warp and weft or garment measurement points, define conditioning and relaxation, and set the maximum permitted change after the agreed cycle count. Mechanical pre-shrinking can reduce later change, but the finished route still needs measurement under the approved care procedure.
- Fabric or finished-garment specimen
- Warp and weft or garment measurement points
- Conditioning and measurement state
- Limit after the named number of cycles
Evaluate appearance and retained function alongside dimensions
A dimensionally stable result does not prove that the workwear still looks or performs as required. Industrial-laundry evaluation can include colour characteristics, creasing, seam puckering, pilling and general visual appearance. The project may also need agreed checks for shade change, staining, surface finish, hand feel, stretch recovery, coating damage, bubbling, edge lift or delamination. For coated, bonded or laminated fabrics, record the construction-specific failure modes before testing and inspect them at agreed intervals. Any retained high-visibility, barrier, flame, antistatic or other protective claim must be verified under the test method and after-care state required by the governing product specification; it should not be inferred from the laundering procedure alone.
- Colour, staining and visible surface change
- Creasing, puckering, pilling and hand feel
- Bond, coating and laminate integrity
- Project-specific retained performance tests
Match the material route to the care risk
Polyester/cotton twills, polyester mechanical-stretch fabrics, bonded softshells and three-layer laminates respond to heat, moisture, detergent, mechanical action and finishing in different ways. A woven workwear fabric may prioritize dimensional stability, colour and surface appearance. A bonded or laminated construction adds adhesive, membrane and layer-compatibility risks, so visual integrity and relevant physical properties should be assessed after care. Garment components, seams, reflective materials, labels, closures and trims can also set a lower care limit than the shell fabric. Approve the fabric and the finished garment as connected but separate control stages, and do not interpret a product model containing ‘60C’ as proof of an ISO 15797 procedure or a specific cycle life.
- Fibre blend and weave stability
- Stretch, finish and colour route
- Adhesive, membrane and backer compatibility
- Garment components and finished-product obligations
Use a supplier verification and release checklist
Ask the supplier for the exact specimen identity, production lot, care procedure, cycle count, laboratory responsibility and complete before-and-after results. Confirm whether the evidence covers fabric, seams, a prototype garment or the final product. For dimensional change, request the marked directions or measurement points and individual results, not only a pass statement. For laminates or bonds, require agreed photographs or ratings at inspection intervals and define what counts as delamination. Record any property retested after care and the method used. Brilliant-Tex can support controlled domestic wash, dimensional-change and construction checks within its documented equipment scope; industrial-laundry simulation or accredited third-party evidence should be assigned according to the project requirement.
- Traceable specimen and lot identity
- Procedure, cycle count and responsible laboratory
- Before-and-after measurements and appearance record
- Retest, escalation and bulk-release rule
RELATED PUBLISHED PRODUCTS
REVIEW RELATED FABRICS
These products illustrate different construction routes. Published specifications support initial evaluation; final performance, test methods and care conditions remain project-specific.PW20/ROO6O 60C
100% polyester mechanical-stretch 2/2 twill, 200 gsm ±5 gsm, dyed with a DWR finish
A woven uniform starting point for setting directional dimensional-change, colour and appearance criteria after an agreed care route.Review product details ↗Hi-Vis ProTCW14/EOOO6O
85% polyester / 15% cotton 3/1 twill, 280 gsm ±10 gsm, high-visibility colour dyed with DWR
A polyester/cotton workwear route where the buyer should define laundering, colour and retained high-visibility obligations separately.Review product details ↗Hi-Vis ProPSR5/E4EC67-1 60C
Polyester/spandex double-yarn ripstop, three-layer TPU and polyester-fleece laminate, 320 gsm ±5%
A laminated workwear starting point for combining dimensional, appearance, bond-integrity and project-specific retained-performance checks.Review product details ↗DurashellPS3/ROOO68-1 60C
Cationic polyester/spandex face bonded to polyester fleece, 280 gsm ±10 gsm
A bonded softshell route for defining stretch, hand feel, surface appearance and bond integrity after the selected care cycle.Review product details ↗FACT CHECK
TECHNICAL SOURCES
Standard status and scope were checked against the official ISO catalogue on 2026-09-02. The purchased standard text and the buyer’s controlled specification govern testing.- ISO 15797:2017 ↗Official scope for industrial washing and finishing procedures used to evaluate workwear; the current edition is published and confirmed.
- ISO 6330:2021 ↗Official domestic washing and drying procedures for textile testing; a complete test combines a selected wash and dry route.
- ISO 3759:2011 ↗Official specimen preparation, marking and measurement method for dimensional-change testing; confirmed current in 2022.
- ISO 5077:2007 ↗Official method for determining dimensional change after a specified washing and drying combination; current edition confirmed.
BUYER FAQs
QUICK CLARIFICATIONS
Does a 60°C product name prove that the fabric passes ISO 15797?
No. A temperature in a catalog model or product name is not a test report. Approval requires the exact ISO 15797 washing and drying or finishing procedure, cycle count, specimen state, acceptance criteria and traceable result required by the project.
Can ISO 6330 results be used for industrially laundered workwear?
ISO 6330 provides domestic washing and drying procedures. It can support a domestic-care requirement, but it should not be presented as evidence of industrial-laundry suitability. Use ISO 15797 or the project’s approved industrial-laundry route when that is the real service condition.
Which results should be checked after laundering?
At minimum, define dimensional change and visible appearance. Depending on the garment and construction, also assess colour, staining, pilling, creasing, seam puckering, stretch, coating or laminate integrity and any protective property that must remain after care.