Anodising is a surface treatment operation used to protect and decorate a piece of Aluminium using anodic oxidation. Anodic oxidation is an electrochemical process which transforms the artificial layer into a 15-25 micron layer of oxide. This process is obtained by successive dips, mainly in sulphuric acid. Designed to provide aluminium with optimum protection, anodising gives aluminium an aesthetically pleasing appearance and a surface which refuses to age, even in challenging environments.

Spectro-colouring is a surface treatment operation used to colour an anodised piece of Aluminium. Spectro-colouring is a colouring process which combines chemical and electric parameters to form a superficial layer of alumina with controlled dimensions, spread and direction. There is thus no added pigment, which leads to great stability over time. Spectro-colouring gives the aluminium colour without taking away its specific mechanical and aesthetic characteristics: metallic brightness, metallic feel and metal veins.