What finishing techniques an OEM jewelry manufacturer offers

Start with the substrate, design geometry, target appearance, expected wear, and cost requirements rather than assuming one coating is universally more durable. Electroplating deposits a metal coating through an electrical process; PVD forms a thin coating in a vacuum process. Their available colors, adhesion, coating properties, and compatibility depend on the specific material and process controls. PVD line-of-sight effects can make recessed or shadowed areas harder to coat uniformly, while plating may reach areas differently depending on rack design and bath conditions. Ask for a sample made with the proposed substrate and finish, and evaluate color, coverage, and wear performance against your intended use.

It can. Polishing changes the underlying surface and may remove material, so polishing after plating can thin or alter the coating and affect color or reflectivity. During use, abrasion can gradually wear through a deposited layer, exposing the underlying metal and changing the visible appearance. Corrosion, skin contact, cosmetics, and storage conditions may also affect how a finish looks over time. Define whether polishing occurs before coating, specify the desired color using an approved physical sample, and ask the supplier to explain the layer sequence. Evaluate samples after the finishing steps and assembly that will be used for production.

A satin, brushed, or textured surface can make fine marks less conspicuous than a highly reflective mirror polish, because its visual pattern is less dependent on an uninterrupted reflective surface. That does not mean it prevents scratches or is automatically more durable. A directional brush can show scratches that run across its grain, and a coating may still wear through under repeated friction. Consider the piece’s contact points, geometry, and expected use; rings and bracelet surfaces often encounter different abrasion than a pendant. Approve a representative sample and assess both its appearance and practical maintenance requirements.

Do not specify a thickness value without defining where it applies and how it will be verified. State the coating metal or system, the measurement unit, the minimum or target thickness, the measurement locations, and the required inspection method. Also identify the substrate and any underlayers, since those affect the finished stack and its performance. A single reading may not represent coverage across a complex shape, particularly in recessed areas. Agree on sampling and acceptance criteria in the purchase specification, and ask whether the proposed method can measure the coating on that geometry. Thickness alone does not establish color consistency, adhesion, or service life.

Yes, contrasting textures can be created on separate design zones, but the boundary and process sequence need to be planned. A typical approach is to establish the polished and brushed areas with controlled masking or localized finishing steps, then apply any coating in the specified sequence. Small details, sharp edges, and recessed features can make clean boundaries difficult, and later polishing may disturb an adjacent texture or coating. Provide marked drawings or reference images that identify each finish zone, clarify whether boundaries should be crisp or softly blended, and approve a sample before bulk production. Confirm the sequence with the supplier for the actual material and construction.

Use tests that reflect the coating type and the product’s expected use, and agree on pass criteria before production. Depending on the finish, evaluation may include visual comparison, adhesion assessment, abrasion or wear testing, and corrosion exposure. ASTM B571 describes qualitative adhesion-testing methods for metallic coatings; ISO 9227 specifies salt-spray test methods for corrosion testing. Neither result by itself guarantees real-world jewelry lifespan, because test conditions do not reproduce every combination of skin contact, friction, chemicals, and care. Ask for the method, sample preparation, test conditions, acceptance criteria, and report scope, then review representative finished samples before authorizing a bulk order.