Metal Plate Oxide Texture for Gloss and Irregular Surface Contrast

The patent applies local quality by creating different surface regions with distinct characteristics: a first region with irregularities providing a non-uniform texture, and a second region with a uniform flat surface. This resolves the contradiction by allowing both surface uniformity (in the second region) and aesthetic variety (in the first region with irregularities and oxide layer) to coexist in different parts of the same exterior surface.

The patent employs composite materials by forming an oxide layer on the aluminum exterior material surface. This oxide layer, combined with the underlying metal substrate and the irregularities, creates a composite structure that provides both the uniformity of the metal base and the aesthetic variety through the oxide layer's optical properties and surface morphology.

Instead of flattening the surface to achieve gloss, the patent inverts the approach by intentionally creating irregularities and then forming an oxide layer that provides both the desired gloss and the novel texture. The oxide layer formation process transforms the irregular surface into a glossy finish while preserving the underlying irregular curves, resolving the contradiction between gloss and texture.

The patent applies parameter changes by altering the surface morphology through controlled irregularity formation and oxide layer deposition. This changes the surface parameters from a completely flat, polished state to one with controlled irregularities and an oxide coating, achieving both gloss (through the oxide layer) and novel texture (through the irregular curves) simultaneously.