AluOldCopper is an architectural anodizing finish developed by Alumet to offer the visual qualities of aged copper within the stable and low-maintenance framework of anodized aluminium. The tone is a muted, warm brown with subtle metallic variation, designed to complement both contemporary and traditional material palettes.
This finish is achieved through Alumet’s electrolytic anodizing process, which forms an oxide layer integrated into the aluminium surface. Colour is introduced using metal salt deposition within the anodic layer, eliminating the need for organic dyes or surface coatings. The result is a highly UV-stable, weather-resistant surface with uniform colouring across panels, while preserving the depth and texture inherent to the anodizing process.
Material and Technical Properties
Base material: Architectural-grade aluminium, suitable for exterior use
Maintenance: Non-reactive, requires only basic cleaning
Fire classification: Non-combustible material (Euroclass A1, aluminium substrate)
The finish is resistant to mechanical wear, atmospheric corrosion, and does not develop surface patina over time. In contrast to natural copper, AluOldCopper does not oxidize, discolour adjacent materials, or change appearance due to environmental exposure.
Application and Specification Context AluOldCopper is intended for architectural projects where a reference to copper aesthetics is desired, but where long-term colour stability, lightweight construction, and reduced maintenance requirements are critical. The finish is commonly specified for:
Façade cladding and rainscreen systems
Sunscreens, brise-soleils, and louvres
Interior wall and ceiling panels
Architectural detailing and trim elements
Its neutral, warm tone allows it to be combined effectively with materials such as stone, glass, and untreated wood, particularly in contexts where natural material compatibility is a design priority.
Sustainability
AluOldCopper is produced using a chromium-free anodizing process. Aluminium substrates can be sourced with high recycled content upon request. The product is fully recyclable at end-of-life, supporting circular material use in architectural projects
