In 2015, Alumet introduced its anodising colours on a standard building material, aluminium composite. This development derived from the fact that the combination between material and anodising technique determines the final finish. The anodising layer is transparent, so the colour, gloss and structure of the end product depend on the material and its pre-treatment. Buy selling both product and anodising process on composite material, Alumet can guarantee the quality of the finish. Aluminium composite is easy to fold into the desire shape and is therefore used worldwide as a building material.

Our colour range

Alumet anodises aluminium in colour and gloss. Our colour range includes silver, gold, bronze, copper, grey, black, red, blue and green. We also produce special colours like stainless steel look, chrome-look or titanium-look. These colours are obtained by a combination of mechanical pre-treatment and colour anodising.



  • Attractive appearance retaining metal character
  • Durable, corrosion-resistant and colourfast
  • High solar reflectivity, Cool Buildings
  • LCA, expected lifespan of more than 80 years
  • 20 year guarantee on all colours Qualanod
  • 40 year guarantee on all colours BS 3987
  • Low maintenance
  • Easy to recycle (Cradle to Cradle)
  • Easy to reuse (Circular Economy

Anodising in colour

There are many methods to manufacture coloured anodized aluminum. Alumet only uses methods that are colourfast an UV-resistant

Dying with inorganic dyes

Dying with inorganic dyes can be achieved, for example, using a single phase dye, as is the case with use of ferric ammonium oxalate. This give the product a golden colour, but when used at a low concentration it results in the colour ‘new silver’. Alumet offers this technique and colour under the name AluGold.

Electrolytic colouring

In the case of electrolytic colouring, Alumet uses metals obtained from metal compounds such as tin from a solution of tin sulphate. This produces colours ranging from light copper to black. The use of copper sulphate yields colours ranging from light pink to cardinal red. The advantage of this electrolytic dyeing process is that it produces very lightfast colours. Alumet produces these colours under the names AluBronze and AluRed. By electrolytically dyeing 2x, we can produce colours under the name AluOldCopper

Combination colouring: electrolytic and inorganic

The use of new, very lightfast, inorganic dyes in combination with electrolytic colouring is becoming increasingly common, for example in the colours ‘copper’ and ‘brass’. In this process, we first perform electrolytic colouring, followed by ferric ammonium oxalate dyeing. Alumet produces these colours under the names AluCopper and AluBrass.


Interference colouring

Interference colouring is a relatively new colouring process, which can also be considered a colour mixing system. This process not only works with colour, but also with refraction (interference). Following the anodisation process in direct current sulphuric acid by a treatment in acid and alternating current makes it possible to enlarge the lower part of the pore. This is followed by electrolytic metal deposition. This results in the colours grey, blue and green. Alumet also performs this interference technique under the names AluGrey, AluBlue and AluGreen.