How is Color Added to aluminium Metal Anodizing?
ohapuqa > 10-11-2019, 06:30 AM
Colored aluminum is what most of us picture when we think of anodizing. That’s the real genius of this process. The nice, stable pores etched into the surface are ideal for introducing tints or pigments.
An illustration of dye being added to fill porosity during anodizing
Empty pores are ideal for adding colorants.
The pigment fills all the empty pores up to the surface, where it’s then permanently sealed off. That’s why anodized colors are so durable – they can’t be scratched off from the surface because in fact the colors are deep down and can only be removed by grinding away the substrate.