ISO 16217:2020
Cosmetics — Sun protection test methods — Water immersion procedure for determining water resistance
This document specifies a procedure of water immersion for the in vivo determination of the water resistance of sunscreen products.
This document is applicable to products intended to be placed in contact with human skin including any component able to absorb, reflect or scatter UV rays and which, in addition, are designed to be less readily removed from the skin by water and/or during water immersion. It is intended to be read in conjunction with ISO 24444.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
4.1 Main steps
4.2 General principle
5 Test criteria
5.1 Selection of the test subjects
5.2 Test area
5.3 Product application
6 Water immersion procedure
6.1 Room conditions
6.2 Water quality
6.3 Immersion sequencing cycle
6.4 Positioning of test subjects
6.5 Drying after immersion
6.6 Reversion to ISO 24444 procedure
7 Water quality and condition
8 Procedural validation
8.1 General
8.2 Calculation of the individual water resistance SPF (SPFiwr)
8.3 Calculation of the water resistance SPF (SPFwr)
8.4 Statistical criterion
9 Test report — post-water immersion SPF
Annex A (normative) Simulated swim test device design
Annex B (normative) Standardized water requirements
Annex C (normative) Standard reference sunscreen
Annex D (normative) Product positioning on test subjects
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
4.1 Main steps
4.2 General principle
5 Test criteria
5.1 Selection of the test subjects
5.2 Test area
5.3 Product application
6 Water immersion procedure
6.1 Room conditions
6.2 Water quality
6.3 Immersion sequencing cycle
6.4 Positioning of test subjects
6.5 Drying after immersion
6.6 Reversion to ISO 24444 procedure
7 Water quality and condition
8 Procedural validation
8.1 General
8.2 Calculation of the individual water resistance SPF (SPFiwr)
8.3 Calculation of the water resistance SPF (SPFwr)
8.4 Statistical criterion
9 Test report — post-water immersion SPF
Annex A (normative) Simulated swim test device design
Annex B (normative) Standardized water requirements
Annex C (normative) Standard reference sunscreen
Annex D (normative) Product positioning on test subjects
Bibliography