
Bronze (Copper & Tin) has been known to man for over 5000 years and the ‘Bronze Age’ when it’s use was confined to items which were valued highly by man at that time. Typical usage would probably have been for items such as spearheads and jewellery.
It was in the 18th & 19th Century’ when Bronze alloys were first used in any quantity for architectural purposes, being used for bronze windows and doors, decorative columns and various sculptures. The value historically placed on bronze can be seen by the use of bronze medals still awarded at the Olympics and other sporting events.
The term Architectural Bronze describes a metal alloy of copper, zinc and various other metals that impart various different qualities to the mix, making it the ideal material to create bronze windows. For example, it is the high proportion of the copper constituent that imparts corrosion resistance and durability. Similarly, the addition of manganese contributes tensile strength.
The typical dark copper to black colour that we associate with architectural bronze is in fact a result of the oxidation of the surface. Newly manufactured Architectural Bronze is toned or painted to a ‘bronze colour.’ That said, oxidation occurs quite rapidly anyway depending on environmental conditions such as humidity and atmospheric pollution. As well as providing the ‘bronze colour’ the layer of oxidation also imparts a degree of corrosion resistance which can be further enhanced by a layer of wax.
Architectural Bronze combine’s stability, strength and longevity with an aesthetic appeal which improves with time and gives a feeling of luxury and prestige both inside and out to any building with bronze windows.