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Type: Article

Section: Testing > Sun Protection

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What is Light? A Brief History of Light and Its Behavior

This primer provides cosmetic scientists, engineers and physicists with an understanding of light. The quantum mechanics of history continue today as a guiding paradigm for computers, satellites and mobile communications, in addition to the cosmetically related fields of photoprotection and visual effects imparted through makeup to change appearance.

Science Exposed—What Should the Minimum Recommended SPF Be to Avoid Sunburn?

“Science Exposed” is a new column aimed at digging into industry controversies to strip them down to the scientific facts. Here, sun protection expert Brian Diffey, PhD DSc, critiques the current SPF test method.

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Here Comes the Sun Protection: ISO Test Methods

Our knowledge of the sun and its effects on skin has increased over the years, including the damaging effects of UVA and UVB light. Testing methods for UVA and UVB rays differ; the following is a review of the testing protocols of the European Union and United Kingdom. (Click through to the Digital Edition)

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Hallstar’s Sunscreen Testing Platform is More Science than Art

Hallstar’s patented Solasure™ platform is the dawning of a new age in sunscreen testing: scientific, quantified, uniform, repeatable, easy-to-use, and cost-effective.

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Total Exposure: The Future of Sun Care is Full Light Protection

History has revealed what has become well-known today: the human skin requires sun protection. But are UV filters enough? Here, the authors discuss the negative effects caused by other wavelengths. In addition, they propose a full light defense strategy.

'[Sunscreen] developers will be able to innovate more efficiently while maintaining high standards of quality and safety for consumers.'

[update] How ISO's Endorsement of Two Test Methods Will Enlighten Sunscreen Development

After 10 years, sunscreen developers are nearing the finish line for more ethical, cost efficient, reliable and faster testing thanks to ISO's endorsement of two standards. The final vote was in September 2024. Here, two experts explain what this means.

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Adaptive Measures: Translating UV Protection to Hair Claims

To test preventative hair care treatments against UV damage, sensitive techniques are required. Here, DSC was used to define a ratio between artificial and natural irradiance levels; from this, methods were built to substantiate claims for UV protection in hair.

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Combing Through Sun and Pollutant Effects on Hair

Trefor A Evans, Ph.D., institute fellow at TRI Princeton and long-time C&T scientific advisor, offers his insights on the latest developments in hair science and what they mean to the cosmetic formulator.

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