UVA Protection Factor - FPUVA

In the face of growing consumer awareness and strict regulations concerning products displaying UVA protection, WENEOS is dedicated with expertise and passion to guiding its customers in submitting reliable data to regulatory bodies.

The FPUVA assessment, designed to quantify a product’s protection against UVA rays, is carried out in accordance with the latest standards in force. This approach is part of our drive to optimize product development and comply with regulatory requirements.

Note that FPUVA will be affected by several factors (phototype, quantity, spreading quality, external conditions, etc.) and should be considered as a scale (indication) of relative effectiveness in limiting the appearance of persistent pigmentation, used as a reference for consumer choice.

days for an in vitro study with a final report

solar studies carried out


compliance with solar standards


As part of your product development or to identify a candidate ingredient, we offer screening tests that enable you to assess UVB and UVA protection with ease.

FPUVA In Vitro - double plates - without irradiation


This test involves evaluating the UVA Protection Factor (UPF), which expresses a sunscreen product's level of protection across the entire UV spectrum, using a suitable substrate on which the product has been spread and measured using a spectrophotometric method.

(ref. HeUVA)

OPTION: UV exposure


To take into account the photostability of your products, we recommend adding a UV exposure phase to your development tests. The sample is then exposed to UV radiation in a solar simulator at a specific dose before the sun protection is measured.

Taking photostability into account in your screening tests is a very important aspect, as all tests to official standards (ISO, FDA, etc.) include a UV exposure phase.

(réf. UVEXPO)


We can assess the sun protection of your products in full compliance with official methods, or claim the properties of your products through exclusive tests developed by WENEOS.

FPUVA in vitro - ISO 24443:2021

ISO method 24443 specifies an in vitro procedure for characterizing the UVA protection of sunscreen products in a reproducible way. In order to determine the relevant UVA protection parameters, the method is strictly followed to provide a UV spectral absorbance curve from which a number of calculations can be made, such as the UVA protection factor (UVAPF). This method is based on the use of in vivo SPF results to scale the UV absorbance curve.

(ref. HeUVA-ISO)

FPUVA (PPD) in vivo - ISO 24442:2022

ISO 24442:2022 - Cosmetics - Sun protection test methods - In vivo determination of the UVA protection of a sunscreen product - is based on the reading of a persistent pigmentation response of the skin to ultraviolet (UV) radiation from a calibrated artificial source. FPUVA is a ratio calculated from the minimum dose required to induce a persistent pigmentation response (MPPDD) with and without the application of sunscreen to the skin of human test subjects. The current method provides for static determination only.

*In vivo tests are carried out by our partners.

Quality control

To optimize your suncare products or check their quality, we offer you exclusive tests developed by WENEOS.

Comparison of in vitro signal absorbance measurements (batch, aging, etc.)

The statistical comparison method makes it possible to compare two sun protection products in terms of ageing, batch, benchmark, etc. When checking the absorbance spectrum between a reference and a test product using an in vitro method, two important rules must be observed. First of all, compare the two products at the same time and under the same conditions, to limit measurement variability. Secondly, a three-step verification based on absorbance values, including comparison of curve shape, variability and intensity.

(ref. HeCOMP-1)

Published method : *In vitro comparison - A new accessible and reliable statistical method to compare the global UV protection properties of cosmetics - Lutz and S. Miksa, H&PC Sun Care, July/August 2013 | *Sunscreen products: Some practical applications for a new comparison test method to help Development and ensure Quality Controls - D. Lutz, S. Miksa and C. Guy, H&PC Today, November/December 2014

Discover the analyses additionalfor all-round sun protection

UV protection

  • SPF – UVB
  • UVA:UVB ratio
  • Photostability
  • Absorbance spectrum

Beyond UV

  • Ultra-Long UVA
  • Blue Light
  • Visible
  • Infrared
  • Full Spectrum
  • UVC


  • Water resistance
  • Sweat resistance
  • Sand resistance
  • Rub resistance
  • Wet Skin Application
  • Extreme conditions
  • Persistence | Long-lasting
  • Immediate protection