Aluminum coil anodizing was created as an alternative to piece part anodizing. Customers demanded improved products and cost containment by anodizers in the mid 1930's. The response was a new concept: The concept of pre-anodizing aluminum coil and strip prior to fabrication. Eventually, manufacturers were able to produce and assemble products without having an intermittent finishing step. The aluminum received into their plants and fed into their production lines was already anodized. Savings in time, material handling, and finishing costs were immediate and significant.