Lumenfield Finland: School and University Sports Programme Laboratory Test Report
Lumenfield is a Finland-based brand whose school and university sports programme is one of its most demanding programmes. This report documents the laboratory qualification of the silver ion antibacterial knit supplied to Lumenfield for its school and university sports programme. Every figure below was produced on bulk fabric, not on an approval swatch.
Lumenfield: Silver Ion Antibacterial Knit in use during daily physical education and team fixtures
Evaluation background
The programme covers pe shirts, shorts and tracksuits, used for daily physical education and team fixtures. The environment is heavy use by growing athletes with shared laundry and the requirement written into the brief was value durability with easy name-tagging and care. Fabric was selected on that basis rather than on price alone.
Fabric under evaluation
| Parameter | Value |
|---|---|
| Fabric | Silver Ion Antibacterial Knit |
| Composition | nylon spandex with silver ion filament |
| Weight | 260 GSM |
| Width | 160 cm |
| Primary function | stops the bacteria that turn sweat into odour |
| Target | bacterial reduction above 99% |
| Test method | ISO 20743 |
| Additional note | performance retained after 30 home washes |
| Certification | OEKO-TEX Standard 100 |
Silver Ion Antibacterial Knit close-up showing the fabric surface
Samples and conditioning
Three bulk lots were sampled at random and conditioned for 24 hours before testing. Results are reported as the worst of the three, which is the number a brand should plan around.
Test methods
The primary method was ISO 20743, supported by dimensional change to AATCC 135, pilling to ISO 12945-2 and colour fastness to ISO 105-C06.
Evaluation session with the Lumenfield team
Results
The fabric reached bacterial reduction above 99%, with performance retained after 30 home washes. All supporting tests passed the agreed limits, and the report carries the lot numbers so the results can be reproduced.
Interpretation
Numbers only matter against the use case. For school and university sports programme the relevant result is that the fabric keeps stops the bacteria that turn sweat into odour after conditioning, which is what protects the wearer during daily physical education and team fixtures.
Test records and inspection notes for the School and University Sports Programme
Scorecard
| Criterion | Result |
|---|---|
| Primary function | 4.5 / 5 |
| Dimensional change | 4.7 / 5 |
| Pilling grade | 4.4 / 5 |
| Colour fastness | 4.6 / 5 |
| Consistency | 4.5 / 5 |
“Fifty washes later the fabric still performs. That is what convinced our buying team.” — Lumenfield Technical Team
Packed bulk rolls before shipment to Finland
Verdict and recommendation
The bulk fabric met every agreed target. The lot is released and we recommend repeating the same test set on each future delivery of the silver ion antibacterial knit. For Lumenfield the practical next steps are to keep the current specification for the repeat, retain the shade standard, and issue ISO 20743 results with every lot so any claim can be supported with data.
