• Smooth machining is a precision machining process that reduces the surface roughness of components through CNC finishing. The standard smooth surface roughness is Ra 1.6 µm (63 µin).
• Mechanical marks after processing are minimal but the overall texture remains visible.
• Applicable Range: Flat surfaces, slightly curved surfaces, or cylindrical surfaces suitable for machining.
• Main Applications: Used for mechanical components, molds, automotive and aerospace parts, precision instruments, etc., to improve surface finish, reduce friction, enhance wear resistance, and provide an aesthetically pleasing appearance.

• #1000 sanding is a fine surface finishing process that uses abrasive paper with a grit size of approximately 10–15 μm to remove minor scratches, improve surface flatness, and prepare the substrate for subsequent polishing or plating.

• General appearance, not suitable for parts with high aesthetic requirements.
• Meets basic assembly and functional requirements.

If the surface finish you require is not listed above, or if you have specific requirements for the part’s surface treatment, please provide a detailed description below.

• Plastic dyeing is a process in which dye molecules are absorbed, diffused, or chemically bonded to the surface of plastic, forming a uniform and stable color layer. Temperature, time, and dye concentration are critical factors controlling the depth, uniformity, and fastness of the dye. The primary purpose is to impart desired color to plastic products, enhancing aesthetics and recognition.

• Pickling is a chemical surface treatment that uses acid solutions to remove oxide scales, rust, and impurities from metal surfaces. Through the chemical reaction between acid and oxides, the process restores a clean, smooth metallic surface, preparing it for subsequent treatments such as passivation, electropolishing, or painting. Its main function is to clean and activate the surface, improving adhesion and corrosion resistance in later stages.

• PVD (Physical Vapor Deposition) is a vacuum-based coating process that deposits thin, dense films of metals or alloys onto a substrate through physical methods such as evaporation or sputtering. It enhances the surface hardness, wear resistance, corrosion resistance, and decorative appearance of the component, while maintaining precise dimensional tolerances.

• Electropolishing is an electrochemical finishing process that removes microscopic peaks and surface irregularities from metal parts. The workpiece acts as an anode in an electrolytic bath, where the high points dissolve preferentially, resulting in a smooth and bright surface. Its primary functions are to improve surface smoothness, enhance corrosion resistance, remove micro-burrs and contaminants, and create a clean, hygienic finish.

• Etching is a surface treatment process that selectively removes material from metal or non-metal surfaces through chemical or electrochemical reactions.Its main purpose is to remove oxide layers or impurities, create specific surface textures or patterns, and improve adhesion, decorative quality, or functional properties.
• The process is widely used in precision component manufacturing, semiconductor production, mold making, nameplates, decorative panels, and mechanical surface preparation.

• Passivation is a chemical surface treatment process in which metals—typically stainless steel or corrosion-resistant alloys—are immersed in a specific acidic solution to form a thin, dense, and stable oxide film on the surface.
• This protective layer removes free iron and surface contaminants, preventing further oxidation and corrosion, thus significantly enhancing the corrosion resistance and service life of the component.
• The process does not alter the part’s dimensions or mechanical properties and is widely used in precision components, medical instruments, electronic housings, and food processing equipment.

• Electrophoresis is a surface treatment process in which a coating material is uniformly deposited onto a metal surface under an electric field. This process significantly enhances corrosion resistance and adhesion and is commonly used as a base treatment before painting or powder coating.

• Chemical conversion coating (Chem Film) is a thin protective layer formed on the metal surface through a chemical reaction. It enhances the corrosion resistance of metals while maintaining good electrical conductivity. This coating is free of hexavalent chromium and complies with MIL-DTL-5541 Type II as well as environmental regulations such as RoHS.

• Laser engraving is a material processing technique that uses a focused laser beam to etch or vaporize the surface of a substrate, creating text, patterns, or designs.
• Applicable Range: Suitable for both flat and moderately curved surfaces; not ideal for highly irregular or soft materials that may burn or deform.
• Main Purpose: Commonly used for marking, decoration, functional engraving, and personalization (e.g., signage, trophies, electronics, jewelry, industrial components), offering high precision, permanent markings, and a clean aesthetic.

• Silkscreen printing is a printing technique that uses a metal or nylon mesh stencil with a design, through which ink is pressed onto a substrate surface to create text, graphics, or patterns.
• Applicable Range: Limited to flat surfaces; not suitable for curved or three-dimensional objects.
• Main Purpose: Used for batch production of high-quality patterns, signage, decorative designs, and functional prints (such as electronic panels, signage, clothing patterns, etc.), combining aesthetics with durability.

• Vacuum plating is a surface treatment process in which a thin metallic or metallic-luster coating is deposited on the substrate in a vacuum environment by evaporation, sputtering, or ion plating (PVD).
• A matt paint layer is then applied on top of the coating to reduce reflectivity, creating a soft metallic finish while enhancing wear, oxidation, and weather resistance.
• This process is widely used in high-end decorative parts, automotive interior trim, consumer electronics, home appliances, and cosmetic packaging — offering both metallic texture and a premium matte appearance.

• Vacuum plating is a surface treatment technology that deposits a thin metallic or metallic-luster coating on a substrate in a vacuum environment through evaporation, sputtering, or ion plating (PVD).
• A high-gloss topcoat is then applied to enhance surface gloss, protect the metal layer, and improve the overall appearance.
• This combined process provides strong metallic luster, high reflectivity, excellent decorative effect, and improved wear, oxidation, and weather resistance.
• It is widely used in automotive trim, household appliances, cosmetic packaging, electronic housings, and high-end decorative parts.

• Tin plating is a surface treatment process in which a layer of tin is deposited on the surface of a metal or other conductive substrate by electroplating or hot-dipping.
• The tin layer provides excellent solderability, corrosion resistance, and electrical conductivity. It effectively protects the substrate from oxidation and improves subsequent soldering and connection performance.
• Tin plating is widely used in electronics, electrical equipment, telecommunications, automotive parts, food packaging, and precision connectors.

• Gold plating is a surface treatment process in which a thin layer of gold is deposited on the surface of a metal or plastic substrate through electroplating or electroless plating.
• This process effectively enhances the electrical conductivity, corrosion resistance, and oxidation resistance of the workpiece while imparting a luxurious and elegant appearance.
• Gold plating is widely used in electronic components, jewelry, watches, connectors, precision parts, and high-end decorative applications.

• Silver plating is a surface treatment process in which a layer of silver is deposited onto a metal substrate, typically through electroplating. This process enhances the metal’s electrical conductivity, corrosion resistance, and wear resistance, while providing an excellent decorative finish.Silver plating is widely used in electronic components, jewelry, tableware, machinery parts, and decorative items. It not only provides functional protection but also improves the product’s aesthetic appeal and performance.

• Nickel plating is a surface treatment process in which a layer of nickel is deposited onto a metal substrate, typically through electroplating. This process enhances the metal’s corrosion resistance, wear resistance, and surface hardness, while also providing an attractive decorative finish.Nickel plating is widely used in automotive components, electronics, machinery parts, kitchenware, and decorative items. It provides functional protection while improving the appearance and service life of the product.

• Galvanization is a surface treatment process in which a layer of zinc is coated onto the surface of a metal, typically through hot-dip or electroplating methods.
• This process significantly enhances the metal’s corrosion resistance and service life, while also providing a certain decorative effect.
• Galvanization is widely used in construction, automotive, home appliances, machinery components, and pipelines. It not only protects the metal but also improves the product’s durability and aesthetic quality.

• Chrome plating is an electroplating surface treatment process that deposits a thin layer of chromium onto a metal or plastic substrate through an electrochemical reaction.
• This process significantly enhances surface hardness, wear resistance, and corrosion resistance, while providing a high-gloss, mirror-like decorative appearance.
• It is widely applied to automotive components, bathroom fittings, furniture hardware, mechanical parts, and electronic housings, offering both functional protection and a premium aesthetic finish.

• Powder Coating – High Gloss is a surface finishing process in which charged powder particles are evenly attracted to the workpiece surface by electrostatic spraying. After high-temperature curing, a dense and glossy coating is formed.
• This process provides a mirror-like high-gloss appearance and excellent protection against corrosion, scratching, and weathering. It is widely used for metal products, smart hardware casings, home appliance parts, and plastic components, enhancing both decorative appeal and durability.

• Powder Coating – Matt is a common surface finishing process in which charged powder particles are evenly sprayed onto a workpiece through electrostatic spraying equipment. The coated parts are then cured at high temperature to form a hard, dense coating layer.
• This process requires no solvents, making it environmentally friendly, with excellent adhesion, corrosion resistance, and mechanical durability.
• The matte finish provides a soft, low-gloss surface with a refined texture, effectively reducing glare and enhancing the overall appearance and durability of the product. It is widely used for metal structures, household appliances, office furniture, automotive components, and smart hardware casings.

• Matt paint is a type of surface finishing process. Using a spray gun and compressed air, the paint is atomized into fine mist particles and evenly applied to the workpiece surface, forming a smooth and non-glossy coating.
• Its main function is to provide the workpiece with a low-reflective, delicate, and soft surface appearance, while offering certain protective and wear-resistant properties. It is widely used in the appearance finishing of smart devices, home appliance housings, electronic components, and automotive interior parts requiring a subtle and elegant texture.

• Brushing is a surface finishing process that uses abrasive belts or wheels to create uniform linear textures (brushed lines) on the surface of a material, resulting in a delicate metallic matte sheen.
• It helps to reduce the visibility of machining marks and minor scratches, minimizes fingerprints, and enhances surface aesthetics and texture.
• Common abrasive belt grits range from #80 to #120, though finer or coarser options can be used as needed. Finer grits produce smoother and softer reflective effects.

• Electrically conductive oxidation is a specialized anodizing process that controls the oxide film’s thickness, porosity, and chemical composition to maintain electrical conductivity while providing corrosion protection.
• This process forms a thin, uniform conductive oxide layer on the surface of aluminum and aluminum alloys, preventing further oxidation while ensuring excellent electrical contact performance.
• Commonly applied to components requiring grounding or conductivity, such as electronic housings, electrical connectors, and EMI shielding parts.

• The anodizing process forms a dense, corrosion-resistant oxide layer on the metal surface.
• This treatment enhances the hardness and corrosion resistance of the metal while preventing further oxidation.
• By combining bead blasting and anodizing, the surface gains a uniform matte metallic texture and can display various colors for improved decorative appeal.

• Bead spray painting – high gloss paint is a surface finishing process in which spray guns and compressed air atomize the paint into fine, uniform droplets that are deposited onto the substrate surface, forming a dense and glossy coating. Its primary functions are to deliver a mirror-like high-gloss appearance and to provide surface protection, thereby enhancing both the aesthetics and durability of the product. It is commonly applied to consumer electronics, home appliances, and plastic components. Color High gloss paint can be applied in all standard colors, offering vivid and highly reflective finishes. Typical options include black, white, red, blue, yellow, green, orange, purple, pink, gray, silver, and brown, meeting diverse design requirements.

• Bead Blast is a surface treatment process in which glass beads or similar spherical media are propelled at high speed onto the surface of metals or other materials, creating a uniform fine texture and matte finish.
• Removes surface oxides, burrs, and minor scratches.
• Improves surface adhesion for subsequent coatings, anodizing, or painting.
• Enhances wear resistance and tactile feel.
• Provides a uniform matte or matte bead-textured appearance.

• Black oxide is a common metal surface treatment that creates a dense black oxide layer on the surface of steel and other ferrous alloys through a chemical reaction.
• This layer provides limited corrosion resistance, reduces light reflection, and offers basic rust protection.
• Compared with other coating methods, the oxide layer is very thin and does not significantly alter part dimensions, making it suitable for precision components.

• Anodizing creates a corrosion-resistant oxide layer on the metal surface.
• This layer enhances the hardness and wear resistance of the metal while providing protection against further oxidation and corrosion.
• Additionally, anodizing allows the surface of the workpiece to be finished in various colors, improving its decorative appearance.