What does this research mean for the field?

Combining photoacoustic and photopyroelectric techniques enables a comprehensive evaluation of photoprotective formulations, revealing that dedicated sunscreens exhibit greater heat dissipation efficiency and thermal conductivity than makeup bases. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To comprehensively evaluate the optical absorption profiles, thermal transport behaviors, and photostability of commercial sunscreens and makeup products.

September 6, 2026Journal of Applied Physics

Thermal and optical characterization, as well as photostability assessment of sunscreens by using photoacoustic and photopyroelectric techniques

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To comprehensively evaluate the optical absorption profiles, thermal transport behaviors, and photostability of commercial sunscreens and makeup products.
Analyzed six commercial cosmetic formulations, including sunscreens and makeup products with and without SPF ratings.
Used photoacoustic spectroscopy to measure spectral absorption across UVB, UVA, and visible regions and to track degradation after irradiation.
Employed front-configuration photopyroelectric techniques to quantify thermal transport properties, specifically thermal diffusivity and thermal conductivity.
All tested formulations absorbed UVB and UVA radiation, while pigmented products additionally absorbed visible light wavelengths.
Sunscreens demonstrated higher thermal diffusivity and thermal conductivity than makeup bases, indicating superior heat dissipation capabilities.
Photostability assessments revealed significant product-dependent photodegradation, with multiple formulations exhibiting decreased post-irradiation absorption.

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Implication

Comparative laboratory study reveals distinct heat dissipation and photodegradation rates in commercial sunscreens, highlighting the role of thermal properties in sun protection.

Cite This Study

Olvera-Cano et al. (2026) studied this question.

synapsesocial.com/papers/6a9d1e4528139818eab210fb https://doi.org/10.1063/5.0345538

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Implication

Comparative laboratory study reveals distinct heat dissipation and photodegradation rates in commercial sunscreens, highlighting the role of thermal properties in sun protection.

Thermal and optical characterization, as well as photostability assessment of sunscreens by using photoacoustic and photopyroelectric techniques

Key Points

Discussion

Implication

Cite This Study

Thermal and optical characterization, as well as photostability assessment of sunscreens by using photoacoustic and photopyroelectric techniques

Key Points

Discussion

Implication

Cite This Study

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