TY Jewelry
Compare a finish system, not two labels
For jewelry procurement, “PVD or electroplating?” is incomplete unless the base material, construction, appearance target and intended use are also defined. Compare the proposed system from substrate preparation through final finish and verification. The practical choice is the process that can produce the approved appearance and meet the agreed requirements on your actual product at a workable cost and quantity.
This guide concerns B2B development of stainless-steel and brass fashion jewelry. It does not assign a universal lifespan to either process. It also does not treat a gold-colour description as proof of gold content, coating thickness or resistance to every exposure.
What changes between the processes
Physical vapour deposition, or PVD, deposits material through a vacuum-based process. Decorative electroplating deposits a coating through an electrochemical process. In purchasing, neither name identifies the complete layer structure or the finished product’s performance. A PVD system may include preparation or underlying layers; an electroplated system may contain several layers and an additional surface treatment.
Ionbond’s decorative PVD information notes that PVD follows the underlying surface texture and has limited coverage of deep recesses or hidden features. Its specified coating system also lists pretreatment requirements for some substrates, including brass. These are useful reasons to ask about geometry and the complete coating stack, not permission to apply that supplier’s process parameters to every jewelry factory. Ionbond decorative coating information.
The manufacturing question is therefore more precise: which substrate, preparation, intermediate layers and final coating are proposed for this design, and how will the finished article be assessed?
Write the same specification for both options
Substrate and components
Name the base material for the main body and for components such as clasps, springs, jump rings and soldered parts. Avoid treating a necklace as one metal merely because the pendant is stainless steel. Establish which components are coated together, coated separately or assembled afterward. A mixed-material assembly needs a plan for matching appearance as well as for function.
Surface preparation and texture
Specify the intended polished, brushed or other finish with an approved reference. Preparation marks can remain visible through a thin decorative coating. Ask which polishing or cleaning steps are proposed and whether an intricate geometry limits access. A smoother photograph does not necessarily represent a different coating; it could reflect different substrate preparation or lighting.
Layer structure and coverage
Request the proposed coating description and, where relevant, layer materials, thickness requirements, measurement method and measurement locations. Distinguish total coating thickness from a particular decorative layer. Check exposed edges, recesses, joints and contacting surfaces rather than assuming one measurement represents the entire piece.
Appearance and function
Agree the colour reference, gloss or texture, viewing conditions and acceptable variation. “18K colour” is an appearance description unless the material and coating specification separately support a gold-content statement. Check how the finish affects moving parts, openings and component fit. The dimensions guide covers those interfaces.
Select evidence that answers the intended-use question
Describe expected use before choosing tests: frequency of wear, contact with perspiration, water exposure, cosmetics, cleaning and the intended care instructions. Do not bundle all those conditions into the word “waterproof.” An immersion observation, abrasion assessment and corrosion test answer different questions.
For each proposed assessment, record the sample configuration, method, conditions, duration or cycles, measured characteristic and acceptance criterion. Agree how appearance is assessed after exposure and whether operation is also checked. Where wear can expose an underlying layer, discuss the relevance of testing after an appropriate wear or pretreatment stage with the laboratory.
Salt-spray hours must not be converted directly into years of customer wear. ASTM B117 describes a controlled test environment and notes limitations in predicting natural-environment performance from salt-spray results alone; it does not prescribe every product’s exposure period or interpretation. ASTM B117 scope and use.
Keep chemical or market requirements separate from cosmetic durability. A visually unchanged sample does not establish the required material or release results. Use the report-reading guide to match each claim with its actual evidence.
Use a procurement comparison card
Product / geometry / component configuration:
Substrate and component materials:
Surface texture and approved appearance reference:
Option A: preparation / layers / final treatment:
Option B: preparation / layers / final treatment:
Thickness definition / measurement method / locations:
Recess, edge and contact-area coverage questions:
Colour comparison and functional acceptance:
Intended use / care instructions / target market:
Evidence required / sample ID / method / acceptance:
Development, production and repeat-order cost:
Process limits / unresolved issues / final decision:Mark each supporting statement as confirmed in the project record, supplier-declared or awaiting verification. This prevents an attractive marketing phrase from becoming a manufacturing acceptance criterion without a definition.
Worked example: two gold-colour necklace options
Imagine a brand comparing a PVD-finished steel necklace with an electroplated brass version of a similar design. This is an illustrative decision exercise, not a recommendation of a particular alloy or coating.
First determine whether the change of substrate alters weight, dimensions, assembly and the design’s manufacturability. Then compare complete finished samples against the same appearance brief. If one option uses different clasp components, record that as a configuration difference. Require evidence relevant to the same intended use before describing one option as more durable.
A buyer may prefer one option for the approved colour and shape while finding the other easier to reproduce at the required quantity. The decision should state which criteria mattered and which evidence remains necessary. It should not become the general claim “PVD is always better” or “thicker plating always lasts longer.” Different processes, substrates and geometries can change the outcome.
Protect the decision on repeat orders
Once a system is accepted, record the approved sample, substrate specification, component list, finish reference and relevant process or supplier identifiers. Ask the manufacturer to flag changes that could affect appearance, fit or evidence coverage. A coating-source change can matter even if the commercial colour name remains the same.
When comparing new production with an aged retained sample, consider whether storage or handling changed the reference. Agree how a reference is maintained and replaced. For collections that mix steel and brass, compare the assembled colour relationship across products rather than approving isolated metal coupons alone.
The reorder consistency guide provides a change record. The materials overview can help frame the wider design choice, while TY Jewelry’s materials and finishes pages provide the starting point for a product-specific B2B discussion.
