Surface Finishing

Surface finishing is a broad range of industrial processes that alter the surface of a manufactured item to achieve a certain property. With our integrated supply chain we are able to offer a wide variety of surface finishing services including heat treatment which can change the mechanical properties of materials, painting, chrome plating and anodizing to change surface color of plastic or alloy. We work with certified strategic partners who put not only beautiful final touch to the product but also care for environment. We at the same time are also obliged to provide customers only regulation complying final products by submitting examination report and make sure only harmless final product reach end customers.

Heat Treatment

Heat treatment is a controlled process that changes the chemical and physical properties of metals and alloys such as steel and aluminum. This method of surface finishing increases surface hardness, ductility, internal stress and strength.



Wet Coating & Powder Coating

Wet paint is a traditional but technologized process of applying liquid paint to a metal or plastic product for finishing. The process of wet painting is accomplished by thoroughly cleaning the surface of object before wet-blasting liquid paint to an even thickness of approximately 15-20 micrometers. This is especially ideal for coloring parts that cannot be heated, and also the best option for parts that require a thin finishing on the surface.

Powder coating is a finishing process in which a coating is applied electrostatically to a surface as a free-floating, dry powder before heat is used to finalize the coating. Powder coating yields a thick, hard finish that is stronger than conventional paints, and is a comparatively environmental friendly method for painting, thus products with powder coating can be found on a range of products, from household appliances to automobile parts.

Advantages of Wet Painting:

Advantages of Powder Coating:

Anodic Oxidation (Anodizing)

Anodic Oxidation, also anodizing, is a process that makes part to be treated forms the anode electrode of an electrolytic cell, which increased resistance to corrosion and wear, and provides better adhesion for paint primers and glues than bare metal does. Anodic films can also be used for several cosmetic effects, either with thick porous coating that can absorb dyes or with thin transparent coatings that add interference effects to reflected light. This techniques is commonly used to color products made of aluminum alloy.

Benefits of Anodizing

Chrome Plating

Chrome plating is a technique of electroplating a thin layer of chromium onto a metal or plastic object. The chromed layer can be decorative, provide corrosion resistance, ease cleaning procedures, to increase surface hardness. The hardness and durability of a chromium metal surface finish means your parts will last longer even under severe mechanical contact and wear situations. We apply chrome plating techniques to several of  plastic products which pursue a smooth and pleasing surface finishing.

Benefits of Chrome Plating


Sandblasting, or abrasive blasting, is the process of smoothing, shaping and cleaning a hard surface by forcing solid particles across that surface at high speeds; the effect is similar to that of using sandpaper, but provides a more even finish with no problems at corners. Sandblasting is now widely applied to create a matt color on the surface of 3C devices and other appliances’ cover.

Labeling & Else

BLL also offers you a variety of processes for branding and customizing your product, we combined partners with laser engraving, label making, printing, water transfer printing technologies to make sure your design idea can be transferred to your product or individual components.