PVD: The Engineering of Tomorrow in Your Bathroom

Modern bathroom fittings are no longer just about design - they are, above all, a matter of advanced materials engineering. One of the most groundbreaking achievements in this field is PVD technology (Physical Vapor Deposition). Although today it is associated with contemporary design and elegant fixture finishes, it originates from industries where there is no room for compromise: medical surgery, aerospace engineering, and the production of cutting tools.

The Power of PVD

PVD is a high-energy vacuum coating deposition process in which the coating material reaches the substrate with enormous energy. As a result, the atomic structure of the layer becomes exceptionally dense, and its adhesion to the fixture is several times stronger than in traditional electroplating.

The outcome is a coating with near‑diamond hardness, resistant to scratching and wear. However, for this technological excellence to serve us for years, it must face a factor we often underestimate - water.

The Paradox of Soft Water

Many users, wanting to protect their bathroom fittings from limescale deposits, choose to install water softeners. And while hard water (rich in calcium and magnesium) causes unsightly streaks and clogs installations, extremely soft water — softened too aggressively — can turn out to be surprisingly corrosive to the fixtures. Why does this happen?

Lower surface tension

Very soft water has a much lower surface tension than hard water. This means it wets surfaces far more easily and shows a higher ability to dissolve various substances - including potentially aggressive cleaning agents that may remain trapped in micro‑crevices.

Corrosive properties

Water stripped of carbonate hardness (calcium and magnesium bicarbonates) becomes chemically unstable. Without these minerals, it begins to “seek” them from its surroundings, which gives it corrosive properties. This can lead to damage in installation components made of copper, steel, or brass, and in extreme cases may even affect the most durable protective coatings.

The golden mean: how to set your water softener

Despite the excellence of PVD coatings, they are not indestructible when exposed to improper water chemistry. If a water softener is incorrectly adjusted and delivers water with very low hardness, you risk installation failures and accelerated degradation of fixture components.

Recommendations:

1. Avoid softening water “to zero”. The optimal hardness level that balances limescale prevention with installation safety is around 6°dH (German degrees).

2. Monitor the parameters. It’s worth regularly checking the water hardness using simple drop-test kits (available online or in home‑improvement stores) to ensure that the device isn’t operating too aggressively. Awareness is key — even the most “bulletproof” technology requires the right working environment.

By choosing fixtures with a PVD coating, we’re opting for the technology of tomorrow — an investment in top‑tier quality and durability. However, our responsibility doesn’t end with the purchase. Properly setting the water softener is an investment in the safety of the entire installation and a safeguard against shortening the lifespan of products designed to impress for years.

Natalia Cywińska

Junior Product Manager