Assessment of the Photoprotection Properties of Hair Cosmetics Using the Hemispherical Directional Reflectance Method
October 2023
in “
Skin Research and Technology
”
TLDR Hair sunscreens were less effective than expected, especially for dark hair.
The study assessed the effectiveness of hair sunscreens using the 410-Solar reflectometer on nine women with different hair colors. Results indicated that dark hair absorbed the most radiation across all wavelengths, suggesting a need for greater protection compared to light and gray hair. Sunscreens had a noticeable effect on light hair at specific wavelengths (400-720 nm and 1000-2500 nm), while gray hair showed changes primarily in the UV and infrared ranges. Overall, the tested hair products did not provide the expected level of photoprotection.
