Condition and Mark
Measuring points are marked in length and width.
Knit Fabric Manufacturer Since 2009 · China
TEST METHOD · ISO 6330 / ISO 5077
Shrinkage After Washing ISO 6330 & ISO 5077
Dimensional change is measured by marking the fabric, washing and drying it with an ISO 6330 procedure and calculating the change with ISO 5077. The US equivalent is AATCC 135.
Specimens cut from the bulk lot.
Washing
ISO 6330 procedures
Calculation
ISO 5077 (EN 25077)
US equivalent
AATCC 135
01
What This Test Measures
ISO 3759 sets marking, ISO 6330 the wash and dry procedure, and ISO 5077 the calculation. “Shrinkage ±5%” is only testable with the wash temperature and drying method.
Many specifications also ask for spirality (“twist”) after washing: how far the side seams or wales turn. It is tested separately from shrinkage.
02
How We Run It in Our Lab
Our technicians follow a written work instruction for this method.
Wash
Washed with the agreed ISO 6330 procedure, for example 4N at 40 °C, with ballast.
Dry
Dried as agreed: line, drip, flat or tumble.
Measure
The change is calculated as a percentage for length and width.
03
Test Conditions
Key settings. Write the method and procedure in your specification.
| Parameter | Setting |
|---|---|
| Washing procedure | ISO 6330, e.g. 4N (40 °C) |
| Drying | Line, drip, flat or tumble, as agreed |
| Marking / calculation | ISO 3759 / ISO 5077 |
| Cycles | One unless specified (e.g. 3 or 5) |
| Equivalent methods | AATCC 135 (US) · GB/T 8629 / 8630 (China). Compare methods → |
04
Results for Your Order
Ask us for results for the selected fabric, shade and test conditions. Acceptance values for your order are agreed in writing.
05
Writing This Test into Your Specification
Write the Full Procedure
Programme, temperature, drying method and number of cycles.
Separate Length and Width
Knits often shrink more in length than width; set limits for each.
Ask About Options
Compacting, relaxation and heat-setting reduce shrinkage; tell us the care label before production.
06
Questions About ISO 6330 / ISO 5077
How is fabric shrinkage measured?
The fabric is marked (ISO 3759), washed and dried with an ISO 6330 procedure, and the change is calculated with ISO 5077.
What does ±5% shrinkage mean?
Length and width may change by no more than 5% after the agreed wash and dry procedure. Tumble drying usually gives more shrinkage than line drying.
Is ISO 6330 the same as AATCC 135?
No. They use different washing machines, programmes and drying, so results are not interchangeable.