The present utility model discloses a watch frame, which is provided with a groove for mounting a dial, and the inner wall of the groove is provided with an elastic clip strip for elastically clamping the dial. The beneficial affected areas are below: An elastic clip strip is set in the groove of the watch frame, due to flexibility of the elastic clip strip it is compressed when the dial is installed so that the dial can be easily mounted into the watch frame. The dial can be clamped in the watch frame firmly. When disassembling, the dial can be removed from the watch frame by pressing the dial in downwards motion which saves time and labor and does not need any auxiliary tools.

The disclosure relates to a treatment method for coloring a metal that includes a) bombardment of the metal with a beam of singly- or multiply-charged gas ions produced by an electron cyclotron resonance source; b) heat treatment in ambient air so as to color the implanted metal using a temperature between 100 C. and 400 C. and an exposure time of between 1 minute and 4 hours.

The method for manufacturing a ceramic component, in particular a ceramic component containing zirconia and/or alumina, for a timepiece or a jewelry piece, is characterised in that it includes a step (E3) of depositing at least one additional element or compound on a ceramic powder, optionally bound, by atomic layer deposition (ALD).

A process for manufacturing a ceramic powder with binder includes at least one additional element or compound, the ceramic powder with binder being in particular based on zirconia and/or alumina and/or strontium aluminate, wherein the process includes a step (E3) of depositing at least one additional element or compound on a ceramic powder with binder by a physical vapour deposition (PVD) and/or by a chemical vapour deposition (CVD) and/or by an atomic layer deposition (ALD).

A method for enhancing the adhesion of a layer for the protection of silver against tarnishing on a substrate including a final silver surface, the method including the following steps of: a) obtaining a substrate that may or may not have an initial silver surface, b) depositing on the substrate of step a) a layer of a silver-copper alloy including between 0.1 wt % and 10 wt % of copper relative to the total weight of the alloy in order to obtain the final silver surface, c) depositing on at least one part of the final silver surface obtained in step b) at least one layer for the protection of silver against tarnishing having a thickness that lies in the range 1 nm to 200 nm.

A method for assembling at least a first element and a second element to form, once assembled, an external component for a portable device, including the steps of: a) making the first element; b) making the second element; c) arranging at least a first groove in the first element and at least a second groove in the second element; d) placing and holding the first and second element end-to-end with at least a third connecting element which is inserted and locked in the first and second grooves.

An external part of a timepiece has a substrate that includes a base layer and a surface layer, the surface layer including Ti or stainless steel; and a coating disposed on the substrate. The coating includes an outermost layer formed primarily of TiC defining an external surface, and an interior layer formed primarily of TiC positioned between the substrate and the outermost layer. An elastic modulus of the interior layer is greater than the elasticmodulus of the outermost layer.

A decorative article has a substrate of which at least part of the surface is configured with Ti or stainless steel; and a coating made of primarily TiC and disposed on the substrate. The coating has at least a first region, and a second region disposed closer to the substrate than the first region. The elastic modulus of the second region is greater than the elastic modulus of the first region.

A method for manufacturing an external component of a watch, of a fashion item or of a jewellery item, including depositing an inner layer on all or part of the surface of an inner face of a substrate made of a transparent material, localised ablation of the inner layer, so as to conserve a part of the inner layer on a first portion of the inner face f the substrate, the ablation being performed so as to form at least one pocket opening onto a second portion of the inner face of the substrate and so as to structure the second portion of the inner fa of the substrate, treating the surface of the inner layer and of the second portion of the inner face of the substrate.

A method for manufacturing an external component of a watch, of a fashion item or of a jewellery item, wherein the external component includes depositing an opaque base layer on all or part of the surface of an inner face of a substrate made of a transparent material, localised ablation of the base layer by laser machining, so as to form at least one pocket the bottom of which has a diffraction grating.