Photoluminescent metal timepiece component

A photoluminescent metallic article is produced using a mixture of metallic, pigment, and glass powders through powder metallurgy, addressing inhomogeneous luminescence issues to achieve a uniform luminance in watch components.

EP4763376A1Pending Publication Date: 2026-06-24THE SWATCH GRP RES & DEVELONMENT LTD
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
THE SWATCH GRP RES & DEVELONMENT LTD
Filing Date
2024-12-20
Publication Date
2026-06-24

AI Technical Summary

Technical Problem

Existing methods for creating phosphorescent metal parts result in inhomogeneous luminescence, which is not desirable for aesthetic reasons in watch components that require a uniform luminance across all-metal parts.

Method used

A photoluminescent metallic article is produced using a mixture of metallic powder, photoluminescent pigment powder, and glass particles or fibers, combined with an organic binder, through powder metallurgy, followed by shaping, debinding, and sintering to achieve a homogeneous phosphorescent effect.

Benefits of technology

The method ensures a metallic appearance with a uniform and homogeneous photoluminescent effect, retaining the aesthetic appeal of watch components by dispersing pigments and glass particles or fibers to conduct light uniformly across the surface.

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Abstract

The invention relates to a material suitable for producing a photoluminescent metallic article (7) by powder metallurgy, said material comprising a mixture of: - at least one metallic powder M (1), - at least one photoluminescent pigment powder P (2), - a powder of glass particles G (3) and / or glass fibers G with said glass transparent to the UVA and visible spectra, - one or more organic binders (4). It also relates to the process for producing the photoluminescent metallic article (7) and said article.
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