Overview
ISO 16359:2025 - Horology - Harmonized practices to demonstrate chemical regulatory compliance of wrist-watches is a new international standard from ISO/TC 114. It provides harmonized, practical guidance to help stakeholders demonstrate chemical regulatory compliance of wrist‑watches and their components according to worldwide product regulations and trade practices. The document supports manufacturers, economic operators and regulators by defining an efficient rule of application for conformity assessment, documentation and testing.
Key topics and requirements
- Scope and intent: Focuses on harmonizing best practices for chemical compliance of wrist‑watches (watch head and band), assuming wrist‑watches are generally low‑risk products for consumers.
- Conformity assessment: Guidance on whether testing applies to finished watches or parts, representative sampling strategies, and when to assess a single watch or a range of references.
- Compliance technical folder: Minimum content required, including administrative data, product identifiers, mapping of evidence to watch parts, and supporting documents (self‑declaration, test reports, material certificates, supplier declarations).
- Laboratory test reports: Detailed report content requirements (laboratory identification, method used, sample description, dates, results, authorizations). Special provisions cover sampling details, environmental conditions, measurement uncertainty and responsibility for sampling.
- Testing methods: Preference for international or national standards and validated methods; laboratory‑developed or modified methods allowed if appropriate and reported.
- Self‑declaration of conformity: Must be signed by an economic operator, include contact details, product identification, description and list of regulations claimed.
- Language and documentation control: Technical documentation and declarations should be in English or an official language of the manufacturer’s country. Test reports must be updated when changes affect chemical compliance.
Practical applications
- Ensures consistent, auditable chemical compliance evidence for wrist‑watch products in global trade.
- Helps manufacturers and suppliers compile a compliance technical folder to satisfy market surveillance and customs requests.
- Guides testing laboratories on report format and sampling information to support regulatory decisions.
- Assists regulators drafting new product chemical regulations or aligning existing rules with international best practices.
Who should use this standard
- Watch manufacturers, assemblers and brands
- Suppliers and material/component manufacturers
- Test laboratories and conformity assessment bodies
- Importers, distributors and fulfilment service providers
- Regulatory authorities and market surveillance agencies
Related standards
- ISO/IEC 17000 (Conformity assessment - Vocabulary and general principles) - normative reference
- References in the document include ISO/IEC 17050 (supplier declaration) and ISO definitions for watch terminology.
Keywords: ISO 16359:2025, horology, chemical regulatory compliance, wrist‑watches, conformity assessment, compliance technical folder, laboratory test report, self‑declaration of conformity.