One of the most important surface treatments that applied on aluminum profiles is anodic oxidation process. Anodic oxidation has been applied for 70 years for both decorative and industrial ends. Anodic finished profiles are exposed to necessary tests and be delivered to the customer after a final optic control is done.

Some notations which used in Europe countries in order to describe the anodic finished aluminum decoration aspects are as follows:

According to QUALANOD (EURAS)
C0
Natural Anodic Color (white/colorless)
C31
Very light bronze
C32
Light bronze
C33
Medium bronze
C34
Dark bronze
C 35
Black
Old German Notations		EV1
Natural Colored (colorless, white)
EV2
German silver
EV3
Gold
EV6
Black