Analysis of Surface Treatment Technology of Eye Shadow Powder Pressed Copper Sheet

In the minds of consumers, eye shadow products are not only a kind of makeup, but also an intuitive reflection of the brand texture. In particular, the copper sheet in the eye shadow powder pressed tray not only supports the stability of the powder, but also plays an important role in visual presentation and tactile experience. Different surface treatment processes directly determine the appearance, durability and effect of the copper sheet on the adhesion of the powder. This article will analyze the mainstream copper sheet surface treatment technology and its application value in layers.

First, the basic grinding and polishing process is the initial key step. The surface of the copper sheet after stamping often has tiny burrs and scratches, which need to be initially flattened by mechanical grinding and drum polishing. This step not only removes sharp edges to prevent the mold from being scratched during the later powder pressing process, but also improves the overall flatness and touch of the copper sheet, laying the foundation for subsequent processes. The high-quality polished copper sheet has uniform reflection and no obvious ripples, providing ideal surface conditions for electroplating or spraying.

Then, electroplating treatment becomes the core process to achieve color diversification. Electroplating gold, rose gold, silver, black nickel and other metal layers can give copper sheets high-grade metallic luster and corrosion resistance. The thickness and uniformity of the electroplating layer directly affect the appearance texture and durability. For example, high-end brands will choose a three-layer electroplating process (copper-nickel-gold), which not only enhances adhesion, but also improves anti-oxidation performance, making the copper sheet less likely to fade or peel in long-term use. The electroplated surface is smooth and tight, which can effectively improve the bonding between the powder and the bottom of the plate when combined with pressed powder.

On this basis, sandblasting and wire drawing processes add more texture options to copper sheets. Sandblasting uses high-pressure sand flow to evenly strike the surface of the copper sheet to form a delicate matte texture, reduce metal reflection, and is suitable for high-end matte series eyeshadow. The wire drawing process forms a continuous texture in one direction, which is not only beautiful, but also has a slight anti-slip effect, making the pressed powder more stable and reducing the risk of loose powder during transportation. Different brands can choose glossy or matte textures according to their positioning to match the product tonality.

It is worth mentioning that anti-fingerprint coatings are becoming increasingly common in high-end series. During the production and packaging process, copper sheets are prone to residual fingerprints and oil stains, which affect the appearance. By spraying nano-level anti-fingerprint coating, fingerprint adhesion can be significantly reduced and stain resistance can be increased. This type of coating has high transparency, does not affect the electroplating or sandblasting color, and can maintain long-term cleanliness and beauty.

Finally, UV protective layer and anti-oxidation seal are also important process links for high-quality eye shadow copper sheets. Since metal materials are easily oxidized and discolored under light and humidity, the surface needs to be covered with a transparent UV protective film or sprayed with an anti-oxidation seal. This step can extend the shelf life of the product, avoid yellow spots or loss of gloss, and ensure a good experience for consumers during use.

Overall, the surface treatment technology of eye shadow powder pressed copper sheets is a multi-process, progressive system engineering:

• From the basic leveling of grinding and polishing,

• to electroplating coloring and protection,

• to sandblasting and brushing to enrich the texture,

• Finally, anti-fingerprint and UV seal are used to achieve long-term durability.

Each step is closely related to the product texture, functionality and brand image. For beauty brands, choosing a copper sheet supplier with mature technology and stable quality is the key to ensuring the quality of eye shadow and improving market competitiveness. In the future, with the continuous innovation of technology, the surface treatment of copper sheets will be more diversified and personalized, bringing more innovative possibilities for eye shadow products.