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Patina
Copper's Natural Beauty
Patina is a green surface texture created by slow
chemical alteration of copper, producing a base (chemistry) basic
carbonate. It can form on pure copper objects as well as alloys
which contain copper, such as bronze or brass.
Patinas form on metal from exposure
to the elements. They are often deliberately added by artists and
metalworkers. Patinas may be used to 'antique' objects, as a part of
the design or decoration of art.
Figuratively, ''patina'' can refer to any fading,
darkening or other signs of age, which are felt to be natural and/or
unavoidable.
Shinny Copper
Some people
like to keep the naturally brilliant luster of highly polished
copper. Left un-polished, the copper will begin to form its natural
brown oxide on the surface. You can make the shine last longer by
spraying copper with any clear spray urethane. However, over time,
the UV rays will deteriorate the urethane coating and the copper
will discolor. The best bet is to let the natural patina form. The
patina seals the copper and once it reaches its ideal thickness,
stops forming.
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