Watch Keywords

[Collectionist]

1

balance
ebauches
hairspring
micro\-adjustment
patina
radio controlled
solar
tourbillon
tropical (dial)
wabi sabi

[Bazooka]

0

Like this a lot admin, my suggestion is radio controlled?

[Tankwatch]

0

wabi sabi...

[SeikoMan]

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And of course patina...

[Addictionist]

2

Patina
patina (/ˈpætᵻnə/ or /pəˈtiːnə/) is a thin layer that variously forms on the surface of stone; on copper, bronze and similar metals (tarnish produced by oxidation or other chemical processes);[1] on wooden furniture (sheen produced by age, wear, and polishing); or any such acquired change of a surface through age and exposure.

Leather
Leather aficionados use the term to describe the ageing of high quality leather. The patina on leather goods are unique to the type of leather and frequency of use and exposure. Patinas can provide a protective covering to materials that would otherwise be damaged by corrosion or weathering. They may also be aesthetically appealing.

Metal
On metal, patina is a coating of various chemical compounds such as oxides, carbonates, sulfides, or sulfates formed on the surface during exposure to atmospheric elements (oxygen, rain, acid rain, carbon dioxide, sulfur-bearing compounds), a common example of which is rust which forms on iron or steel when exposed to oxygen. patina also refers to accumulated changes in surface texture and colour that result from normal use of an object such as a coin or a piece of furniture over time.[2]

Stone
Archaeologists also use the term "patina" to refer to a corticated layer that develops over time that is due to a range of complex factors on flint tools and ancient stone monuments.[1] This has led stone tool analysts in recent times to generally prefer the term "cortification" as a better term to describe the process than "patination".[3]

Watch dials
More on this can be found in the next post... or in this article on tropical dials.

Etymology
The word "patina" comes from the Latin for "shallow dish". Figuratively, patina can refer to any fading, darkening or other signs of age, which are felt to be natural or unavoidable (or both). The chemical process by which a patina forms is called patination, and a work of art coated by a patina is said to be patinated. The Statue of Liberty gets its green color from the natural patina formed on its copper surface. A patina layer takes many years to develop under natural weathering. Buildings in damp coastal/marine environments will develop patina layers faster than ones in dry inland areas.
Artists and metalworkers often deliberately add patinas as a part of the original design and decoration of art and furniture, or to simulate antiquity in newly made objects. The process is often called distressing. A wide range of chemicals, both household and commercial, can give a variety of patinas. They are often used by artists as surface embellishments either for color, texture, or both. 
Patination composition varies with the reacted elements and these will determine the color of the patina. For copper alloys, such as bronze, exposure to chlorides leads to green, while sulfur compounds (such as "liver of sulfur") tend to brown. The basic palette for patinas on copper alloys includes chemicals like ammonium sulfide (blue-black), liver of sulfur (brown-black), cupric nitrate (blue-green) and ferric nitrate (yellow-brown). For artworks, patination is often deliberately accelerated by applying chemicals with heat. Colors range from matte sandstone yellow to deep blues, greens, whites, reds and various blacks. Some patina colors are achieved by the mixing of colors from the reaction with the metal surface with pigments added to the chemicals. Sometimes the surface is enhanced by waxing, oiling, or other types of lacquers or clear-coats. More simply, the French sculptor Auguste Rodin used to instruct assistants at his studio to urinate over bronzes stored in the outside yard. A patina can be produced on copper by the application of vinegar (acetic acid). This patina is water-soluble and will not last on the outside of a building like a "true" patina. It is usually used as pigment.

In the case of antiques, several views are held on the value of patination and its replacement if damaged, known as repatination. Preserving a piece's look and character is important and removal or reduction may dramatically reduce its value. If patination has flaked off, repatination may be recommended.[14] Appraiser Reyne Haines notes that a repatinated metal piece will be worth more than one with major imperfections in the patina, but less than a piece still with its original finish.[14]

Thanks wikipedia

Check our own forum Aged to perfection on some great examples..

[PaltryJack]

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Cool, thanks admin..