SIST EN ISO 18861:2022 PDF

Name: SIST EN ISO 18861:2022 — Cosmetics - Sun protection test methods - Percentage of water resistance (ISO 18861:2020)
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Cosmetics - Sun protection test methods - Percentage of water resistance (ISO 18861:2020)

Название (английский):

SIST EN ISO 18861:2022

Cosmetics - Sun protection test methods - Percentage of water resistance (ISO 18861:2020)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 19
Дата публикации:: 16 июня 2022 г.
ICS:: 71.100.70
Технический комитет:: KDS - Cosmetics, chemical disinfectants and surface active agents

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Описание (английский):

This document specifies a procedure for evaluating the water resistance retention percentage, by comparing the sun protection factor (SPF) before water immersion (hereafter referred to as the "static" SPF) and after a fixed period of water immersion (hereafter referred to as the "wet" SPF).

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 18861:2021 (ISO 18861:2020) - Cosmetics - Sun protection test methods - Percentage of water resistance - defines a standardized, reproducible procedure to evaluate how much sun protection a sunscreen retains after water exposure. The standard compares the static SPF (before immersion) with the wet SPF (after a defined water immersion procedure) and expresses water resistance as a percentage retention. It is intended for manufacturers, test laboratories and regulatory bodies to substantiate water‑resistance claims for sun care products.

Key topics and requirements

Purpose: Determine the percentage of SPF retention after water immersion by comparing pre‑ and post‑immersion SPF values.

Referenced methods: Uses the in‑vivo SPF measurement procedure of ISO 24444 and the water immersion protocol of ISO 16217.

Test subjects: Human panel testing in accordance with ISO 24444; at least 10 subjects shall be selected.

Test set‑up: Product sites are located between the scapula line and the waist and configured for full immersion in a simulated swim test device (design information in Annex A).

Water immersion sequence: A defined immersion/rest chronology is specified (see ISO 16217 and Annex B) - the standard includes example immersion and drying steps (e.g., 20 min immersion with circulating water plus drying interval).

Calculations: Individual and mean percentage of water resistance are calculated (sections 5.4–5.5), including computation of lower confidence limits (section 5.6) to support statistical assessment.

Reference product and acceptance criteria: Standard reference sunscreen and acceptance criteria for control product P2 are provided (section 4.6 and 5.7, Annex C).

Reporting: Required test report elements and data handling are specified (section 6).

Practical applications

Substantiating product claims such as “water‑resistant” or “very water‑resistant” for marketing and regulatory compliance.

Quality control and formulation optimization during product development to measure how surfacing, film formers, or UV filters affect SPF retention in water.

Comparative testing of product variants, batch verification, and third‑party certification testing by accredited laboratories.

Regulatory dossiers where objective, reproducible evidence of water resistance is required.

Related standards

ISO 24444 - In vivo determination of SPF (required SPF test method)

ISO 16217 - Water immersion procedure for determining water resistance (required immersion protocol)

For definitive procedures, timelines and full calculation methods, consult the full text of EN ISO 18861:2021 / ISO 18861:2020 and the normative references (ISO 24444, ISO 16217).

SIST EN ISO 18861:2022 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Practical applications

Who uses this standard

Related standards

Технические детали

ISO 18861:2020

Cosmetics — Sun protection test methods — Percentage of water resistance

ISO 24444:2019/Amd 1:2022

Cosmetics — Sun protection test methods — In vivo determination of the sun protection factor (SPF) — Amendmen…

SIST EN ISO 16217:2022

Cosmetics - Sun protection test methods - Water immersion procedure for determining water resistance (ISO 162…