Copper-gold powder
Copper-gold powder
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Copper-gold powder
Product Details
Product Overview
Copper-zinc powder is an ultra-fine, flake-like metallic powder crafted through a series of processes—including melting, spray-drying, ball milling, and polished oxidation—using copper and zinc as the primary raw materials. It is also known as copper-zinc gold powder, commonly referred to as "gold powder." Depending on the varying zinc content, copper-zinc gold powder can exhibit a range of distinct hues: when zinc content is below 10%, it produces a pale golden effect, often called "red gold"; between 10% and 25%, it yields a rich, pale golden tone, known as "blue-red gold"; and at 25% to 30%, it creates a deep, vibrant golden appearance, referred to as "blue gold."
01 Copper-Gold Powder Performance Parameters
| Model | Color light | Median diameter (μm) | Surface Tension Force (cm²/g) | Features |
| 220 (Mesh) | Red Light / Blue-Red Light / Blue Light | 36-40 | 2500–3500 | High brightness, strong metallic feel |
| 400 (Mesh) | Red Light / Blue-Red Light / Blue Light | 25-30 | 3500–4500 | High brightness, strong metallic feel |
| 600 (Mesh) | Red Light / Blue-Red Light / Blue Light | 17–20 | 4000–5000 | High brightness, strong metallic feel |
| 800 (Mesh) | Red Light / Blue-Red Light / Blue Light | 13-15 | 4500–5500 | High brightness |
| 1000 (Mesh) | Red Light / Blue-Red Light / Blue Light | 9-11 | 6000–7000 | Fine, with high brightness |
| 1200 (Mesh) | Red Light / Blue-Red Light / Blue Light | 6-8 | 7000–8000 | High brightness |
| 1500 (Mesh) | Red Light / Blue-Red Light / Blue Light | 2-4 | 10,000–13,000 | High brightness, excellent stability |
| Gravure Printing 240 Mesh |
Red Light / Blue-Red Light / Blue Light | 36-40 | 3000–4000 | High brightness, strong metallic feel |
| Gravure 400 Mesh | Red Light / Blue-Red Light / Blue Light | 23-27 | 4000–5000 | High brightness, strong metallic feel |
| Gravure 600 Mesh | Red Light / Blue-Red Light / Blue Light | 16-20 | 4500–5500 | High brightness, strong metallic feel |
| Relief Printing Powder |
Red Light / Blue-Red Light / Blue Light | 6-8 | 8,000–10,000 | Strong luminosity, excellent coverage, and excellent flaky structure. |
| Relief-printed gold bars |
Red Light / Blue-Red Light / Blue Light | 6-8 | Dust-free, easy to disperse | |
02 Antique Bronze Powder Performance Parameters
| Model | Median diameter (μm) | Surface Tension Force (cm²/g) | Features |
| 800 (Mesh) | 13-15 | 4500–5500 | High brightness |
| 1200 (Mesh) | 6-8 | 7000–8000 | High brightness |
Product Applications
Usage Notes
Important Notes
！ Typically, ordinary copper and gold powders exhibit excellent floating properties, so it’s recommended not to add wetting agents or dispersants—otherwise, their floatability (and metallic effect) may be compromised.
！ If you want to specifically adjust the floating performance of gold powder, you can slightly reduce its buoyancy (by adding 0.1–0.5% citric acid), which will, in turn, diminish the metallic effect.
！ If adjusting the construction viscosity and drying time still fails to achieve the desired optical effect—meaning the pigment particles haven’t aligned properly—then a small amount of surface lubricant and leveling agent can be added.
！ Generally, copper-gold powder exhibits good redispersibility. If precipitation is observed, you can add less than 2.0% of an anti-settling agent or thixotropic agent to the formulation, such as bentonite or fumed silica.
！ Storage of copper-gold powder and its finished products: Both copper-gold powder and its manufactured items should be stored in a cool, dry environment. Any unused copper-gold powder must be sealed immediately after use. Otherwise, prolonged exposure to air will cause the powder to deteriorate due to oxidation.
！ Nitrocellulose and epoxy resins should be avoided, as both can chemically react with copper to form a gel-like substance. If these two resins must be used, they should be applied as soon as possible.
！ Resins with a low acid value—preferably below 3—should be selected whenever possible; the lower the acid value of the resin after system processing, the better.
！ Aromatic and ester solvents help fully wet and evenly disperse copper-gold powder particles, so it’s advisable to avoid using alcohols, ketones, and incompletely neutralized fatty acid solvents.
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