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Standard | Outdoor Expertise: A Comprehensive Analysis of National Anti-UV Standards

Published: 2026-09-25 👁 101 views
Last updated 2026-09-25 — Australia and New Zealand are countries with high levels of ultraviolet radiation and were among the first to propose and establish standards and requirements for UV-protective products. They stipulated the use of the “Ultraviolet Protection Factor” or “UPF value” to evaluate the UV-blocking performance of products. For example, Australia classifies UV-protective products, where 15-24 indicates good UV protection...

Australia and New Zealand are countries with high levels of ultraviolet radiation and were among the first to propose and establish standards and requirements for UV-protective products. They stipulated the use ofthe “Ultraviolet Protection Factor” or “UPFvalue” to evaluate the UV-blocking performance of products. For example, Australia classifies UV-protective products, where 15-24 indicates good UV protection, 15-39 indicates very good UV protection, and 40-50 and 50+ indicate excellent UV protection.

In China’s national standard GB/T 18830-2009 “Assessment of the Ultraviolet Protective Performance of Textiles,” there are stricter evaluation criteria for UV-protective textiles. The standard specifies: only when textiles are tested under the conditions defined by the standard, and the sample’s UPF value is >40, and the arithmetic mean value of UVA transmittance T(UVA)AV<5%时,才能被称为“防紫外线产品”。

What are UPF and UVA?

UPF (Ultraviolet Protection Factor) value, also known as the Ultraviolet Protection Factor, indicates the ability of fabric to block ultraviolet rays. It is the ratio of the average effect of ultraviolet radiation calculated without skin protection to the average effect calculated with fabric protection.

UVA transmittance refers to the transmittance rate. It is the ratio of transmitted radiant flux to incident radiant flux within the wavelength range of 315–400 nm, denoted as T(UVA)AV. The T(UVA)AV value is related to the tightness and porosity of the fabric.


In summary, the higher the average UPF value and the lower the UVA transmittance, the better the UV protection provided by the fabric.


Third-party testing agency test case:

Actual testing of UV-protective products: reasons for increases or decreases in values before and after washing:

1

The case where UV protection is better before washing than after is because certain UV-protective fabrics that have undergone anti-UV finishing or coating maysustain wear or have auxiliary agents come off during wearing or washing, resulting in a decrease in UV protection test values after washing.


2

The case where UV protection is better after washing than before is due to fabric shrinkage. After washing, the fabric contracts and becomes tighter, thus increasing the UV protection test value of the product post-wash.


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