Gold-plating process for VS Factory watches

The VS factory employs PVD (Physical Vapor Deposition) and composite layering techniques to achieve a brilliant, durable gold finish; the coating is resistant to fading and peeling, ensuring the watch retains its pristine appearance over time.

PVD Gold Plating Technology

PVD (Physical Vapor Deposition) is a vacuum coating technology and the core process for gold plating high-end watches.

⚛️Vacuum Physical Vapor Deposition

In a high-vacuum environment, a metal target (such as titanium, zirconium, chromium, or an alloy) is bombarded with high-energy ions, causing it to vaporize into atoms and ions; these are then accelerated by an electric field and deposited uniformly onto the surfaces of the watch case and bracelet, forming a dense coating.

🎯Mainstream manufacturing processes

  • Magnetron Sputtering
  • Ion Plating
  • Arc Ion Plating

By introducing reactive gases such as nitrogen, golden nitride layers—including TiN, ZrN, and TiCN—can be formed, with colors precisely adjustable from yellow gold and rose gold to champagne gold.

🔗Strong adhesion · Dense and uniform

The coating bonds with the substrate at the atomic level, offering adhesion far superior to traditional electroplating; the coating is dense and pinhole-free, uniformly covering complex curved surfaces and intricate grooves without leaving any untreated areas.

🌿Eco-friendly · Rich in color

The process is entirely vacuum-based and physical, free from electroplating wastewater and cyanide contamination, and complies with environmental standards; a wide range of gold tones can be consistently reproduced by adjusting the target material and gas mixture.

Composite lamination process

It is difficult for a single-layer coating to simultaneously achieve optimal adhesion, hardness, and color. The VS Factory employs a composite layering process, depositing multiple layers—each serving a specific function—to create a durable gold finish.

Five-layer composite structure

From the substrate to the surface, the coating is deposited layer by layer with a gradient transition. Each layer is in the micrometer range, and the overall coating is only a few micrometers thick, yet it carries multiple functions such as wear resistance, color development, and oxidation resistance.

Substrate · Adhesion

VS Factory employs a base layer of metal—such as titanium or chromium—to form a metallurgical bond with the 904L stainless steel substrate, providing a secure anchor for the top coating and effectively preventing peeling or flaking.

Transition Layer · Stress Resistance

There is a difference in the coefficient of thermal expansion between the coating and the substrate; the transition layer, featuring a gradual compositional gradient, buffers the stress caused by temperature fluctuations and prevents coating cracking.

Color layer + protective layer

The color layer—composed of titanium nitride (TiN) or zirconium nitride (ZrN)—exhibits a rich golden hue, while the outermost protective layer further enhances oxidation and corrosion resistance, locking in the luster.

Fade-resistant · Colorfast

The value of gold-plated finished products from the VS factory lies in the longevity of the gold finish; a multi-layered structure combined with vacuum deposition ensures a stable and enduring color.

🛡️Atomic-level bonding

The coating bonds to the substrate at the atomic scale, achieving an adhesion strength of up to tens of megapascals; under normal wear conditions, it exhibits resistance to peeling, detachment, and fading.

💧Antioxidant and sweat-resistant

The dense plating allows for effective breathability; exposure to air, sweat, daily perspiration, bathing, or cosmetics will not cause fading.

⏳Enduring and Ever-Renewing

Unlike traditional gold plating, which shows signs of wear and fading within months to a year, PVD gold plating retains its brilliant, like-new appearance for years under normal wear.

Note: Although PVD coatings are highly wear-resistant, severe impacts or prolonged, intense friction against hard objects may still cause localized wear; please avoid rough handling or hard knocks.

Inspection of VS Factory Gold-Plated Finished Products

Every gold-plated finished product from VS Factory undergoes a rigorous testing process to ensure that its color, adhesion, and durability meet established standards.

1.Coating thickness measurement

X-ray fluorescence (XRF) thickness gauges are used for the non-destructive measurement of coating thickness, supplemented by cross-sectional verification via the metallographic sectioning method, to ensure that the thickness of each layer meets specifications.

2.Adhesion testing

Cross-cut tests, thermal shock tests (thermal cycling), and bending tests verified that the coating is firmly bonded to the substrate and does not peel off.

3.Color consistency inspection

A spectrophotometer is used to measure Lab color values and compare them against standard color swatches, ensuring consistent gold tones across products within the same batch and between different batches.

4.Corrosion resistance test

Neutral salt spray tests and artificial sweat tests are conducted to verify the coating's resistance to corrosion and discoloration in humid, acidic/alkaline, and sweat-exposed environments.

5.Abrasion resistance test

Taber abrasion tests and eraser abrasion tests are used to simulate daily friction and evaluate the coating's wear resistance and color retention durability.

6.Appearance and Condition Inspection

Visually inspect surfaces for pinholes, scratches, and stains using a magnifying glass and microscope; for components with precious metal plating, re-verify the gold content via XRF to ensure the purity meets standards.

Showcase of VS Factory Gold-Plated Finished Products

Traditional Electroplating vs PVD Gold Plating

See the advantages of PVD gold plating at a glance.
Comparison items Traditional electroplated gold PVD gold plating
Process Principle Electrochemical deposition Vacuum physical vapor deposition
Adhesion Weak, prone to peeling Atomic-level bonding, extremely strong
Coating hardness Low, easily worn HV 2000+, extremely durable
fade resistant Several months to a year Color retention after normal wear for many years
Environmental protection Cyanide-containing wastewater Zero wastewater, environmentally friendly
Color selection Relatively simple A variety of adjustable gold/rose gold/champagne gold options are available.

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