The Manufacturing Process of High-Gloss pencil ferrules Bands High-gloss pencil ferrules bands, renowned for their high luster and vibrant colors, serve as a key component in elevating the quality of pencils. Their manufacturing process is meticulous and technologically advanced, primarily divided into three major steps: precision machining, anodizing, and dyeing and sealing. Step 1: Precision Tube Processing The process begins with raw materials—high-purity aluminum tubes with a purity of up to 99.9%. The pencil ferrules tubes are first subjected to precision stretching and cutting to produce pencil ferrules band semi-finished products with precise dimensions and smooth surfaces. The high purity of the pencil ferrules ensures an extremely uniform surface finish in subsequent processing. Step 2: Anodizing and Chemical Polishing This is the core step in achieving a high-gloss surface. The pencil ferrules clamp semi-finished products are sent to the anodizing plant for chemical polishing treatment. By precisely controlling parameters such as the temperature, concentration, current intensity, and processing time of the electrolyte solution, a dense, uniform, and microporous transparent anodized oxide film is grown on the surface of the pencil ferrules clamp. This process not only completely eliminates metal defects but also gives it a particularly bright finish. Step 3: Dyeing and Sealing After obtaining the transparent oxide film, the next step is dyeing. The anodized pencil ferrulesrings are immersed in a specific dye, and the dye molecules penetrate the micro-pores of the oxide film through capillary action. Subsequently, the dyed pencil ferrules rings undergo “hot water sealing” treatment, where the oxide film undergoes a hydration reaction at high temperatures, completely closing the micro-pores and permanently locking the color within the film. This step ultimately imparts vibrant, rich, and fade-resistant color to the pencil ferrules sleeve. Following these processes, a high-brightness pencil ferrules sleeve with vibrant color, wear resistance, and corrosion resistance is produced, significantly enhancing the value of pencil products.