NF EN ISO 24443

NF EN ISO 24443

August 2012
Standard Cancelled

Determination of sunscreen UVA photoprotection in vitro

ISO 24443:2012 specifies an in vitro procedure to characterize the UVA protection of sunscreen products. Specifications are given to enable determination of the spectral absorbance characteristics of UVA protection in a reproducible manner. In order to determine relevant UVA protection parameters, the method has been created to provide a UV spectral absorbance curve from which a number of calculations and evaluations can be undertaken. This method relies on the use of in vivo SPF results for scaling the UV absorbance curve.

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National standards and national normative documents

Publication date

August 2012

Number of pages

39 p.

Reference

NF EN ISO 24443

ICS Codes

71.100.70   Cosmetics. Toiletries

Classification index

T75-615

Print number

1 - 31/07/2012

International kinship

ISO 24443:2012

European kinship

EN ISO 24443:2012
Sumary
Determination of sunscreen UVA photoprotection in vitro

ISO 24443:2012 specifies an in vitro procedure to characterize the UVA protection of sunscreen products. Specifications are given to enable determination of the spectral absorbance characteristics of UVA protection in a reproducible manner.

In order to determine relevant UVA protection parameters, the method has been created to provide a UV spectral absorbance curve from which a number of calculations and evaluations can be undertaken. This method relies on the use of in vivo SPF results for scaling the UV absorbance curve.

Standard replaced by (1)
NF EN ISO 24443
December 2021
Standard Current
Cosmetics - Determination of sunscreen UVA photoprotection in vitro

This document specifies an in vitro procedure to characterize the UVA protection of sunscreen products. Specifications are given to enable determination of the spectral absorbance characteristics of UVA protection in a reproducible manner. In order to determine relevant UVA protection parameters, the method has been created to provide an UV spectral absorbance curve from which a number of calculations and evaluations can be undertaken. These include calculation of the Ultraviolet-A protection factor (UVA-PF) [correlating with in vivo UVA-PF from the persistent pigment darkening (PPD) testing procedure], critical wavelength and UVA absorbance proportionality. These computations are optional and relate to local sunscreen product labelling requirements. This method relies on the use of static in vivo SPF results for scaling the UV absorbance curve. This document is not applicable to powder products such as pressed powder and loose powder products.

Table of contents
  • Avant-propos
    iv
  • 1 Domaine d'application
    1
  • 2 Termes et définitions
    1
  • 3 Principe
    2
  • 4 Appareillage
    3
  • 4.1 Spécifications relatives au spectrophotomètre UV
    3
  • 4.2 Étalonnage du spectrophotomètre UV
    3
  • 4.3 Étalonnage de la source d'exposition aux UV
    3
  • 4.4 Surveillance de la source d'exposition aux UV
    4
  • 4.5 Étalonnage du radiomètre UVA utilisé pour contrôler l'irradiation de l'échantillon d'essai
    4
  • 4.6 Substrat/plaque
    4
  • 5 Méthode d'essai
    4
  • 5.1 Présentation du mode opératoire d'essai
    4
  • 5.2 Étalonnage de l'équipement et validation des plaques d'essai
    5
  • 5.3 Mesurages de l'absorption à travers la plaque
    5
  • 5.4 Application de l'échantillon
    5
  • 5.5 Mesurages de l'absorbance de la plaque traitée
    6
  • 5.6 Nombre de déterminations
    6
  • 5.7 Détermination du FPS calculé initial (FPSin vitro), de la valeur "C" du FPUVA initial (FPUVo) et de la dose d'exposition aux UV
    6
  • 5.8 Exposition aux UV
    8
  • 5.9 Mesurage du spectre d'absorbance ajusté final
    8
  • 5.10 Calcul du FPUVA des plaques après exposition de l'échantillon aux UV
    8
  • 6 Mode opératoire utilisant la feuille de calcul de la présente Norme internationale
    9
  • 7 Formulation du produit de protection solaire de référence S2
    9
  • 8 Rapport d'essai
    10
  • Annexe A (normative) Étalonnage du spectrophotomètre UV et contrôle de transmission de la plaque
    11
  • Annexe B (normative) Mode opératoire d'étalonnage du rad iomètre/spectroradiomètre pour le mesurage du flux
    16
  • Annexe C (normative) Valeurs de calcul: Spectres d'action de la PPD et de l'érythème et intensité de l'irradiance spectrale des sources UVA et UV-SSR
    18
  • Annexe D (normative) Spécifications de la surface des plaques d'essai de PMMA
    21
  • Annexe E (normative) Produit de protection solaire de référence S2
    23
  • Annexe F (informative) Calculs statistiques
    28
  • Bibliographie
    31
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