01How PVD coating is made
The parts are polished to their final finish first, because PVD is thin and shows every scratch underneath. They are cleaned in ultrasonic baths, dried and mounted on racks that rotate inside a vacuum chamber.
Once the air is pumped out, the chamber is heated and the parts are cleaned again by ion bombardment. Then a solid target, such as titanium or zirconium, is vaporized, either by sputtering (knocking atoms off with ions from a plasma) or by an electric arc. The metal atoms travel through the chamber and condense on the parts. Feeding in nitrogen turns titanium into titanium nitride, which is gold colored; carbon-containing gases give black and gray films.
The result is a thin film bonded at the atomic level to the surface. Some suppliers then deposit a very thin layer of real gold on top for a warmer color, which is sometimes sold as "PVD gold plating". Ask which you are getting.
02PVD vs electroplating
| PVD coating | Gold electroplating | |
|---|---|---|
| Process | Vacuum deposition of a hard metal compound | Gold deposited from a liquid bath with electric current |
| Typical base | Stainless steel | Brass, copper, silver, steel |
| Hardness | Very hard, scratch resistant | Soft; scratches and rubs off |
| Water and sweat | Good on stainless steel | Wears faster, base can tarnish |
| Real gold content | Often none; sometimes a thin gold top layer | Yes, the layer is gold alloy |
| Color range | Gold tones, black, blue, rainbow | Gold, rose, white (rhodium) |
| Equipment | Expensive vacuum systems, batch runs | Lower setup, widely available |
The practical result: PVD on steel holds up to daily wear, showers and the gym far better than thin gold plating on brass. The trade-off is the precious metal story; a titanium nitride coating is gold colored, not gold.
03PVD and the waterproof jewelry trend
Most jewelry sold as "waterproof", "tarnish-free" or "shower-proof" is 316L stainless steel with a PVD gold finish. Steel does not tarnish, and the coating resists water and sweat, so the piece can be worn all day.
Be careful with the claims. "Waterproof" is shorthand; PVD still wears at high-friction points like ring shanks and clasps over time, and scratches through to steel can happen. Describe what you tested. And do not call PVD jewelry "gold" or "gold plated" unless there is actually a gold layer: in the US, the FTC Jewelry Guides treat gold claims as needing gold. Gold tone is the safe term for titanium nitride.
04Pros and cons
- Much harder and more wear resistant than electroplating
- Handles water, sweat and daily wear well on stainless steel
- Wide color range including black, gunmetal and rainbow
- Cheap base metal keeps unit cost low
- Coating process uses dry vacuum deposition rather than plating chemical baths
- Often contains no real gold, which limits how you can describe it
- Hard to repair; worn pieces need stripping and recoating
- Color can vary between batches and suppliers; gold tones can look slightly brassy or greenish
- Thin coating shows any scratches or poor polishing underneath
- Batch process; small color matches and reruns can be slow
05Typical uses and price
- Waterproof gold-tone chains, rings and huggies
- Black and gunmetal men’s jewelry
- Watch cases and bracelets
- Bag and apparel hardware (buckles, zipper pulls)
- Faucets, fixtures and hardware outside jewelry
Price tier: Budget to mid. Stainless steel is cheap and PVD runs are batched, so PVD gold steel undercuts vermeil and gold filled by a wide margin while lasting longer than flash plating. A real gold top layer and tighter color control push the cost up.
06How to spec it with a factory
Two "18K PVD" samples can be completely different coatings. Spell out base metal, coating type, color and tests in the tech pack.
| No. | Field | What to write |
|---|---|---|
| 01 | Base metal | 316L stainless steel, with mill certificate |
| 02 | Coating | PVD type (e.g. titanium nitride) and whether a real gold top layer is included, with karat |
| 03 | Thickness | Target coating thickness range in microns, measured on bulk |
| 04 | Color | Approved physical color standard (e.g. 18K yellow tone); allowed variation |
| 05 | Surface prep | Polish level before coating: mirror, brushed or bead blast |
| 06 | Performance tests | Artificial sweat, salt spray and abrasion or rub tests with agreed methods and durations |
| 07 | Nickel release | EN 1811 test for EU sales |
| 08 | Product claims | Wording agreed in advance: gold tone vs gold, waterproof vs water resistant |
Certifications and marks
- Nickel release (EU REACH)
- Applies to the finished piece in skin contact; the steel base contains nickel, so test the coated part.
- Lead and cadmium limits
- EU REACH and California Proposition 65 restrict them in jewelry; ask for test reports.
- FTC Jewelry Guides (US)
- Not a certificate, but they govern gold claims. Without a gold layer, describe it as gold tone.
From the factory floor
- Approve color on a physical sample under daylight and store lighting. PVD gold tones vary between suppliers and even between chamber runs.
- Ask for sweat and abrasion test results, then wear test rings and bracelets for a few weeks yourself.
- Some factories electroplate gold on steel and call it PVD. Ask to see the process, and compare durability on samples.
- Keep the base steel at 316L. Cheaper steel under a coating is a common way to cut cost.
07PVD vs gold vermeil
Gold vermeil is real gold of at least 2.5 microns over sterling silver: precious metals throughout, but softer and pricier. PVD on steel is tougher and cheaper, but usually contains little or no gold.
08PVD vs gold filled
Gold filled has a thick layer of real gold bonded to brass and lasts years. PVD on steel is cheaper and more water resistant but is a coating, not gold. See gold filled vs gold plated for how gold layers compare.
09FAQ
Q01How long does PVD coating last on jewelry?
On stainless steel with daily wear, usually years rather than months, much longer than thin gold plating. Rings and bracelets wear first at friction points.
Q02Is PVD coating real gold?
Usually not. Most gold-tone PVD is titanium nitride or a similar compound. Some suppliers add a thin real gold top layer, which should be stated with its karat.
Q03Can you shower with PVD jewelry?
Generally yes when it is PVD on stainless steel. Harsh chemicals, abrasive cleaners and rubbing against hard surfaces still wear it over time.
Q04Does PVD coating tarnish?
No. The coating and the stainless steel base do not tarnish. It can wear or scratch, which shows the silver-colored steel underneath.
Q05What is the difference between PVD and IP plating?
Ion plating (IP) is a type of PVD, and the two names are often used interchangeably in jewelry and watches.