Anodizing is the production of a resistant, high strength oxide layer on the aluminium surface. This not only has a protective function but also provides a high quality and distinctive metal look. The surface can also be coloured by the embedding of colour pigments. This allows the aluminium to have a colour spectrum spanning silver, gold and bronze and even black. Mechanical pre-treatment can also be used to produce special effects , such as, for example, the „architectural bronze“ look.
