OS GSO ISO 11540:2025

ISO 11540:2021
Omani Standard   Current Edition · Approved on 22 April 2025

Writing and marking instruments — Specification for caps to reduce the risk of asphyxiation

OS GSO ISO 11540:2025 Files

OS GSO ISO 11540:2025 Scope

This document specifies requirements to reduce the risk of asphyxiation from caps for writing and marking instruments. It relates to such instruments which in normal or foreseeable circumstances are likely to be used by children up to the age of 14 years.

This document is not applicable to the following:

—    writing and marking instruments which are designed or only intended for use by adults, e.g. jewellery pens, expensive fountain pens, professional technical pens;

—    transit caps for refills.

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