If you’re looking to gain an in-depth understanding of UV light, Sunscreens and Skin Cancer then the following sunscreen resources will be an excellent start.

World Health Organisation and UV Radiation

Ultraviolet (UV) radiation is part of the electromagnetic spectrum emitted by the sun. UVC rays (wavelengths of 100-280 nm) are absorbed by the atmospheric ozone, most radiation in the UVA range (315-400 nm) and about 10 % of the UVB rays (280-315 nm) reach the Earth’s surface.

The World Health Organisation has a comprehensive range of information on UV and sun protection.

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Understanding Australian SPF and UVA Tests

The current AS/NZS 2604 Sunscreen Standard was implemented in 2012 and requires both primary and secondary sunscreens sold in Australia to comply with updated test requirements for both UVA Broad Spectrum and SPF Sun Protection claims.

This document by Dermatest provides a comprehensive overview of the current SPF and UVA testing standard.

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About the UV Index and Sun Protection Times

Understanding the Global Solar UV Index

Wikipedia on Sunscreens

Wikipedia on UV Radiation

TGA review the safety of nanoparticles in sunscreens

The Skin Cancer Foundation and Sun Protection

Choice's guide to buying and using sunscreen