Sulfuric Acid.The predominant anodizing process today. Coatings 0.1-1.0 mil thick formed in a 15 pct. solution, 12 asf, 18-24 volts, 70F for 10-60 min. This coating is usually organically dyed or colored with deposited metals (two-step). Offers a wide array of applications. Most anodizers use this method, although other acids are available for specialty purposes.