Type II aluminum anodizing is performed using a sulfuric acid bath to create the anodic aluminum oxide surface. This method is often referred to as “conventional anodizing” for good reason. Type II anodizing is very versatile and provides an ideal surface for dye application. The resulting color will vary with alloy composition. Aluminum with low alloying elements will show practically no color change. This means Type II can be dyed practically any color or shade.