Now, more and more company would like to choose metal back cover for their new device. The metal back cover not only brings much better touch feel but also is more durable. But how turn the whole piece of aluminum into a metal back cover? Not like the elegance process of the Ads in fact, it’s a complicated and full of the noise from machine.
Step 1. Prepare the material
For the reason that the hardness and strength of aluminum are a little weak, so the factory will add some other heavy metal as required.
Step 2. Melt aluminum
Step 3. Casting
Step 4. Cut the original model and send to next step
Step 5. Anodizing or painting
Anodizing will give you the cold metal feel just like iPhone 6S back cover while painting will bring warm coat for the phone.
Step 6. Machining to remove the spare parts
Step 7. Polishing and painting
Step 8. Baking paint
Actually, every back cover will go through five times painting, five times baking and twice polishing.
Step 9. Opening pores
Step 10. Diamond cutting
For getting a perfect metal back cover, many of the steps need to do times and times.