ISO/NP 26714

Determination of Water Resistance using Hybrid Diffuse Reflectance Spectroscopy (HDRS) for ISO 23698

Scope

This document/standard will specify a method for determining the water resistance performance of sunscreen products by using Hybrid Diffuse Reflectance Spectroscopy (HDRS) ISO 23698 monochromatic and polychromatic systems following controlled water immersion cycles.
The method:
• Extends ISO 23698 static SPF/UVA-PF determination,
• Incorporates immersion procedures consistent with ISO 16217 and/or ISO 18861
• Utilizes HDRS instrumentation compliant with ISO 23698: Monochromatic and Polychromatic
• Determines post-immersion SPF values
• Expresses water resistance performance as absolute post-immersion SPF and/or percentage SPF retention relative to initial static SPF.

This document will specify measurement principles and calculation procedures for assessing post-immersion UV attenuation performance. It does not define regional regulatory labelling requirements.