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Tagged with 'diving'

What is patina and how is it done?

'Patina' means an oxidation layer on metal objects. Think, for example, of the gray-green layer that you often see on copper and bronze objects. The formation of a beautiful natural patina layer can take decades.


Patina layers can be formed naturally, but metal objects can also be artificially patina coated by the use of chemicals. This is called with ‘Patination’. For example, this technique is often used in bronze sculptures, where artists use patina layers mainly because of the beautiful shiny structure. Various colors can be obtained by using different chemicals. For example, ‘liver of Sulphur’ or ‘potassium-polysulphide’ is used for a gray to jetty black color, iron nitrate for brown and copper nitrate for green, but numerous applications of chemicals and colors are possible. This technique can also be used for 'discoloration' of, for example, a dial.

Helium Release Valve

A helium release valve is a valve that is designed for watches that are suitable for deep-sea diving. The noble gas helium consists of one of the smallest molecules and is able to penetrate into the watch when diving at great depths (and thus high pressure).

Helium Release Valve

Once in the watch, this gas can’t escape quickly enough, unless the watch is equipped with a helium release valve to let the helium escape from the watch during lowering the pressure. This is necessary to prevent the watch from exploding during decompression. There are helium release valves that you can open and close yourself, but there are also brands / models where the valve automatically opens and closes. Not every watch that is designed for scuba diving is equipped with a helium release valve. In that case, these watches are designed so that no helium can penetrate into the watch.

Diving Watches

You can always buy and wear a diving watch without actually use it professionally. But it’s always nice to know what they are actually made for. Just in case you would make a deep dive in your life.
A dive watch generally needs to have a water resistance of at least 10 ATM (100 meters).

Diving Watches

It is recommended to have a water resistance of at least 20 ATM for scuba diving. But today it is not a problem anymore as most diving watches have at least a water resistance of 30 ATM and some go even deeper. Some watches go so deep you can’t reach the depth without proper protection. Let’s all think about the Rolex Deepsea See-Dweller ‘James Cameron’ that goes to 3900 meters under water. But those watches need helium release valves to protect the watch from pressure. A true diver’s watch must accord to severe standards like the ISO 6425 and it is clearly marked so there is a proper distinction between them and watches that are not suitable for actual diving. What differentiates a dive watch from a sports watch is that dive watches are specifically made for diving. Even deep sea diving in the ocean. But how many people go buy a diving watch because they need it especially for diving?

What we really need to know is the reason why people would still buy a diving watch without the professional use of it. The fact is that as far as we know diving watches are tough, reliable and robust. If you can trust a dive watch with a water resistance up to ,for example, 300 meters, you can trust that same watch to go surfing, sailing, and rafting. If the watch can get wet, it can take a beating.
Discover our selection of diving watches below.