An Overview and Comparison on Ultraviolet Transmittance Test Standards

This article guides you about the ultraviolet transmittance test and an overview of parameters comparison between main standard tests.

The harm of Ultraviolet Transmittance

In recent years, the depletion of the ozone layer has led to an increase in ultraviolet (UV) radiation on Earth, including a higher proportion of UVB rays. People are more aware of UV radiation’s potential harms, such as skin aging, wrinkles, loss of elasticity, dark spots, and skin cancer.

The Importance of Textile Ultraviolet Transmittance Test

Textiles serve as the first layer of protection between humans and nature, and there is growing interest in UV-protective textile products. In the diverse and complex textile market, accurately testing textiles for UV protection has become crucial for identifying quality products. The volume of UV protection tests conducted by inspection agencies is increasing. Ensuring the accuracy, reliability, and convenience of test results is a key goal of laboratory quality control.

UVA UVB

UPF Index

The UPF index, short for the Ultraviolet Protection Factor, measures the ratio of UV radiation’s average effect on unprotected skin to that on skin protected by fabric. It quantifies a textile’s effectiveness in blocking UV rays.

Test Standard

AATCC 183、 EN 13758-1、AS/NZS 4399、GB/T 18830、JIS L 192

Below we list a comparison of parameters for each standard:

AATCC 183

Application: all textiles

Wavelength Range (nm): 280-400

Number of samples: 2 wet, 2 dry

For non-homogeneous samples: each color and each expected result should have at least one sample.

Humidity Control: (21 ± 1)°C, (65 ± 2)% RH

Additional Notes: sample UPF value, the average transmission rates for UVA and UVB, The blocking rates for UVA and UVB.

EN 13758

Application: Garment Fabrics

Wavelength Range (nm): 290-400

Number of samples: 4

For non-homogeneous samples: each color and each expected result should have at least two samples.

Humidity Control: (20 ± 2)°C, (65 ± 2)% RH

Additional Notes: Sample UPF value, the average UPF value,  the average transmission rates for UVA and UVB

AS/NZS 4399

Application: Sun-protective fabrics, clothing, and gear that are designed to be worn close to the skin。

Wavelength Range (nm): 290-400

Number of samples: 2 warp, 2 weft

For non-homogeneous samples: each color and each expected result should have at least one sample.

Humidity Control: (20 ± 5)°C, (50 ± 2)% RH

Additional Notes: sample UPF value, the average UPF value, the average transmission rates for UVA and UVB

GB/T 18830

Application: All textiles

Wavelength Range (nm): 290-400

Number of samples: 4 dry

For non-homogeneous samples: each color and each expected result should have at least two samples.

Humidity Control: (20 ± 2)°C, (65 ± 2)% RH

Additional Notes: sample UPF value, the average UPF value, the average transmission rates for UVA and UVB

JIS L 1925

Application: All textiles

Wavelength Range (nm): 290-400

Number of samples: 2 warp, 2 weft

For non-homogeneous samples: to be specified

Humidity Control: (20 ± 15)°C, (65 ± 20)% RH

Additional Notes: sample UPF grade,  UV blocking rate

 

Related Resources

AATCC 183 Ultravolet Transmittance Tester YG(B)912S

AATCC 183 Textile Ultraviolet Penetration & Protection Tester YG(B)912E

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