This invention discloses a paper processing device, comprising a bottom block, a connecting cavity fixedly arranged in the bottom block, a penetrating cavity communicated with and arranged in the lower end wall of the connecting cavity. The penetrating cavity is communicated with the exterior space. A lifting motor is fixedly arranged in the lower end wall of the connecting cavity, the upper end wall of output shaft of which is fixedly provided with a driving pulley. A driven pulley in the connecting cavity is arranged on one side of the driving pulley. The lifting motor works to drive the driving pulley to rotate to drive the driven pulley to rotate, so an inner threaded block is driven to rotate to drive a threaded rod to move upwards; then a stirring fan is driven to enter a reaction cavity. The automatic structure adopted by this device realizes automation of paper processing.

A housing of an electronic device is provided. The housing includes a first surface, a second surface, a side surface surrounding at least a portion of a space formed between the first surface and the second surface, a first surface layer formed by applying a first texture and a first color to a first area of at least one of the first surface, the second surface, and the side surface of the housing, and a second surface layer formed by applying a second texture and a second color to a second area within the first area, wherein at least one of the first surface layer and the second surface layer includes an oxide film layer.

Treatments for anodic coatings that provide improved resistance to staining and cracking during various manufacturing processes are described. According to some embodiments, the methods include placing the anodic coatings in partially sealed states by sealing only the outermost portions of the anodic coatings, which protect the outer surfaces of the anodic coatings from contamination and staining. Inner portions of the anodic coatings are left unsealed, thereby making the anodic coatings more compliant and resistant to cracking when exposed to manufacturing processes, even those that involve exposure to high temperatures or high mechanical stress. Subsequent to the processing, another sealing process can be implemented to fully seal the anodic coatings so that they provide good corrosion and wear resistance.

A metal surface treated to have a distinct cosmetic appearance such as an integral layer that is glossy may be used in electronic devices. The surface treatment may include polishing a metal surface, texturing the polished metal surface, polishing the textured surface, followed by anodizing the surface, and then polishing the anodized surface. The metal surface may also be dyed to impart a rich color to the surface.

The present disclosure is drawn to covers for electronic devices. In one example, a substrate can include a metal alloy. An acid anodizing layer can be formed on the substrate. A dye application can be applied on the acid anodizing layer. A first nickel-free sealing layer can be formed on the dye application. An alkaline anodizing layer can be formed on the first sealing layer. A second nickel-free sealing layer can be formed on the alkaline anodizing layer.

A method for electroless deposition of aluminum or an aluminum alloy on a substrate surface is provided. The method includes activating the surface of the substrate to be coated by applying a coating of a catalyst metal; preparing a mixture of urea (NH.sub.2CONH.sub.2) and anhydrous aluminum chloride (AlCl.sub.3) having a 2:1 molar ratio of AlCl.sub.3:NH.sub.2CONH.sub.2 to obtain a Lewis acid room temperature ionic liquid (RTIL) optionally containing an alloy metal salt; dissolving a hydride reducing agent in an aprotic anhydrous solvent to obtain a hydride solution; mixing the hydride solution and the AlCl.sub.3:NH.sub.2CONH.sub.2 RTIL to obtain an electroless Al solution; exposing the activated surface of the substrate to the electroless Al solution; and removing the electroless Al solution from the substrate surface; wherein upon exposure of the activated substrate surface to the electroless Al solution, an Al or Al alloy coating is obtained on the activated substrate surface.

Processes for cleaning anodic film pore structures are described. The processes employ methods for gas generation within the pores to flush out contamination within the anodic film. The pore cleaning processes can eliminate cosmetic defects related to anodic pore contamination during the manufacturing process. For example, an anodic film that is adjacent to a polymer piece can experience contamination originating from a gap between the anodic film and polymer piece, which can inhibit colorant uptake of the anodic film in areas proximate the polymer piece. In some cases, an alternating current anodizing process or a separate operation of cathodic polarization is implemented to generate hydrogen gas that bubbles out of the pores, forcing the contaminates out of the anodic film.

The invention relates to traceable metallic products, methods of uses and methods of making same. The metallic products may be made traceable for integrity purposes, identification purposes, counterfeit avoidance and the like. The invention also relates to metallic supports for nanostorage of various compounds and samples.

A surface treatment process for a metal article provides a uniform and unblemished surface finish to the metal article. The surface treatment process anodizes the metal article to form an anodic oxide layer on a surface, and the metal article is activated using a pre-dyeing solution. The pre-dyeing solution contains complex organic acid and sodium acetate. The anodic oxide layer of the metal article is dyed for color and the dyed anodic oxide layer of the metal article is finally sealed.

This invention discloses a paper processing device, comprising a bottom block, a connecting cavity fixedly arranged in the bottom block, a penetrating cavity communicated with and arranged in the lower end wall of the connecting cavity. The penetrating cavity is communicated with the exterior space. A lifting motor is fixedly arranged in the lower end wall of the connecting cavity, the upper end wall of output shaft of which is fixedly provided with a driving pulley. A driven pulley in the connecting cavity is arranged on one side of the driving pulley. The lifting motor works to drive the driving pulley to rotate to drive the driven pulley to rotate, so an inner threaded block is driven to rotate to drive a threaded rod to move upwards; then a stirring fan is driven to enter a reaction cavity. The automatic structure adopted by this device realizes automation of paper processing.