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 STEP
1 - Fabric Sampling
- Standards:
ASTM E122 and D2905
- Sample each lot, shipment or production
run
- Primary Sampling Unit = bolts of Fabric
or cartons of garments
- Lab Sampling Unit = one yard of fabric or
one garment
STEP 2 - Simulated Use Exposures
- Standards:
ASTM D6544
- Simulate treatment over 2 years of normal
wear
- Laundering:
AATCC
135 - 40 cycles
- Exposure
to UV: AATCC 16E - 100 hours /
AATCC fading units(AFU)
- Exposure to Chlorinated water(swimsuit fabrics)
STEP 3 - UV Transmittance Testing
- Standard:
AATCC 183 - 1998
- Spectrophotometer testing
- UPF,
UVA & UVB transmittance, and UVA
& UVB blockage
STEP 4 - Labeling
- Standard:
ASTM D6603
- Required Labeling Elements
- UPF value
- Classification
category, either Good UV Protection, Very Good UV Protection,
or Excellent UV Protection
- Statement that the UV-protective textile
product has been labeled according to this ASTM standard guide
- Optional Labeling Elements
- Percent UV-B and UV-A blocked value or percent
UV-block value
- Statement that the UV-protection value
indicates the lowest amount of protection that can be expected
during the
life of the product
- Statement that the product reduces exposure
to harmful UV-A nad UV-B rays
- Statement that no textile product provides
100% protection from UV radiation
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