Apple launched two colors of bright black and matte black as early as the iPhone 7 series models, but due to many problems such as paint peeling and scratches, Apple has never launched a black version of iPhone models.
According to the list published by the United States Trademark and Patent Office (USPTO), Apple has obtained a new technology patent, outlining the anodizing process involving etching and dyeing, which can form a unique matte black color scheme, which can be applied to MacBook, iPad in the future, iPhone, Apple Watch, and more.
Apple stated in the patent that the anodizing process can dye the casing in different colors to enhance its appearance appeal to consumers, but some colors are more difficult to achieve.
Apple has outlined a variety of process implementations in the patent. One of the processes here. During the process of forming the anodized layer on the metal substrate, the color particles are injected into the holes of the anodized layer, and the anodized layer is etched. The outer surface of the ® forms light-absorbing features on the outer surface, allowing L to achieve colors below 10 in the CIE Lab* color gamut.
Apple Figure 1 partially shows an extremely matte black device, including the iPhone, Apple Watch, MacBook, and iPad; while Figures 3A-3B show views of anodized parts before undergoing the etching process; Figures 7A and 7B show an anode with light-absorbing features An example image of the component.
