Type II class 1 is a non-dyed anodizing process. This process usually has a thinner coating with a tolerance ranging from 0.0002"-0.0005".
Type II class 2 is a dyed anodizing process in which you can obtain a large variety of colors. This process has a thicker coating than Type II class 1, with a tolerance ranging from 0.0005"-0.001".
Type III class 1 is a non-dyed anodizing process. This process has a coating tolerance ranging from 0.001"-0.002".
Type III class 2 is a dyed anodizing process in which black is used. This process has a coating tolerance ranging from 0.001"-0.002".
Base metals are washed with a commercial soap to clean away oils and other surface debris.
Base metal is submerged in a cold rinse tank where commercial soap and surface debris are washed away.
Base metal is submerged in a sodium hydroxide based etch that takes away surface imperfections, scratches, minor scuffs, etc.
Base metal goes through a cold and warm rinse to remove sodium hydroxide based etch chemicals.
Deoxidizer is used to remove any film left from the etching process, leaving the metal brighter.
A cold rinse is used to remove left over deoxidzer from the base metal to prepare it for the anodizing process. This is the final step in the cleaning process.
A controlled natural oxidation process using a sulfuric acid bath.
A three step rinse process to clean and clear the sulfuric acid and remaining surface oxidation away.
Dye is added to a liquid bath where the anodized metal is then submerged to allow the dye to be absorbed. If clear, Skip to step 11.
Freshly dyed metal is rinsed to remove unabsorbed dye.
A sealant is applied to the anodized material to help corrosion resistance and dye retention.
A normal rinse is then followed by a heated rinse in the final step of the anodizing process.