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Section: Testing > Sun Protection
Sun Protection
Testing SPF 15–100, Indoor vs. Outdoor
Lab tests on sunscreens show it takes more energy to produce mild erythema on protected skin than unprotected skin. Yet the FDA questions the need for SPFs higher than 50. In response, two outdoor studies were conducted using commercial products to challenge standing premises and determine if there is a measurable difference in an SPF 100 and SPFs of 50 or less.
Sun Protection
Testing SPF 15–100, Indoor vs. Outdoor
Lab tests on sunscreens show it takes more energy to produce mild erythema on protected skin than unprotected skin. Yet the FDA questions the need for SPFs higher than 50. In response, two outdoor studies were conducted using commercial products to challenge standing premises and determine if there is a measurable difference in an SPF 100 and SPFs of 50 or less.
Sun Protection
Comparatively Speaking: SPF and Calculated SPF
In order to prepare the industry for the upcoming Sunscreen Symposium, organized by the Florida chapter of the Society of Cosmetic Chemists, industry expert Tony O’Lenick asks Dennis Lott to explain the difference between SPF and calculated SPF. This is the first of two columns on sun protection.
Sun Protection
ISPE Presents Complete Immersion SPF Testing
ISPE Laboratories presents a new method to evaluate the solar protection factor of water-resistant products.
Hair Care
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.
Regional
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)
Sun Protection
Report: Superdrug Commits to Increase Sunscreen Testing on Darker Skin Tones
Superdrug has reportedly committed to include at least 35% of skin types 5 and 6 in its sun cream and skin care trials.
Safety/Stability
Research Reviews Non-penetrating Sunscreen Vehicles, Looks to Jojoba
Several "carriers for the future" were highlighted, such as lipid carriers, cyclodextrin derivatives, encapsulation approaches and non-penetrating sunscreens incorporating UV filters and jojoba oil conjugates.
SPF/Sun
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.
Sun Protection
7 Years in the Making: CE Recommends In vitro SPF Double Plate Test Method
"... No in vitro method had [previously] advanced to the stage that CE could recommend it. So those who did not want to use an in vivo method could use any ... unvalidated method; this should no longer be the case."
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