pH Value of Fabric Explained: How It Works in Performance Sportswear
pH Value of Fabric is best understood as acidity or alkalinity of extractable liquid. This entry explains how it behaves inside a finished garment rather than only in the laboratory.
What the term means
acidity or alkalinity of extractable liquid, which is why the value appears on almost every technical data sheet. Working figures for pH Value of Fabric normally sit around 4.0 to 7.5 for skin contact in mainstream production. Note ISO 3071 aqueous extract on the tech pack so nobody tests against an older revision.
Why it matters in practice
off-pH fabric causes skin irritation and dye problems, so it influences buying decisions more than most buyers expect. Record elastane content alongside pH Value of Fabric, because blends shift the measured value. A result outside 4.0 to 7.5 for skin contact usually points to process drift rather than to the fibre itself.
Typical values seen in activewear
4.0 to 7.5 for skin contact. Ranges vary by construction, so compare like with like. Keeping reference values for pH Value of Fabric lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ISO 3071 aqueous extract, since both affect the reading.
How it is measured
ISO 3071 aqueous extract is the reference normally quoted on a test report. Working figures for pH Value of Fabric normally sit around 4.0 to 7.5 for skin contact in mainstream production. Note ISO 3071 aqueous extract on the tech pack so nobody tests against an older revision.
Frequent mistakes
Comparing results from different standards, testing unwashed fabric, and writing the target without tolerance are the common errors. Record elastane content alongside pH Value of Fabric, because blends shift the measured value. A result outside 4.0 to 7.5 for skin contact usually points to process drift rather than to the fibre itself.
