Also, the patina is divided into 2 types:
A natural patina appears on the surface of the products over time. And it is considered the most valuable. It takes a little time to appear. Thin film will be visible in a year. A good thick layer appears only after 80-100 years. It depends on the weather conditions, the climate of the country and the composition of the atmosphere. Artificial patina is now especially popular.
Its color is made close not only to noble black, but also to green. This process is called patination. On bronze it is made better than on brass. But why is not artificial patination applied everywhere? In modern interior it’s hardly used.
It’s because the basis of artificial patina is varnishes, waxes and paints that isolate metal, and prevent it from being covered with valuable natural coating.