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Professional Zinc Alloy Surface Finishing Solutions

特殊色电镀

Special Color Plating — Rose Gold, Gun Metal, Champagne & More

The fashion-color playbook: alloy systems, process windows, and how we hold ΔE ≤ 1.0 across batches.

Colors On Our Line

Nine fashion finishes, all Pantone-matchable

Rose Gold
Champagne Gold
Black Nickel
Gun Metal
Pearl Nickel
Antique Bronze
Antique Copper
Matte Gold
Green Gold
💡 Pantone Matching ServiceSend a Pantone code or a physical swatch. Our lab formulates the bath, plates test coupons, and verifies with a spectrophotometer until ΔE ≤ 1.0. Development takes 7–10 days.
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How Special Colors Are Built

Color is a 3-layer system — base, color flash, protection

1Base Coat (Brightness Foundation)

Bright nickel or acid copper base at 8–12 μm. The base brightness decides 70% of the final look — a dull base makes muddy rose gold.

Key Parameters
Base thickness: 8–12 μm

2Color Bath Formulation

Rose gold = Au-Cu alloy (75–85% Au). Gun metal = black Ni-Sn. Antique = controlled oxidation over copper. Ratios are weighed, never eyeballed.

Key Parameters
Rose gold: Au-Cu 75–85% Au
Gun metal: Ni-Sn black
Antique: Cu + controlled oxidize

3Color Flash Plating

Short, precisely timed immersion. 10 seconds too long = one shade darker; too short = base shows through. Every color has its own window.

Key Parameters
Time window: 30–120 s
Temp: 45–55 °C
Current: 0.5–1.5 A/dm²

4Color Stabilization

Immediate rinse to freeze color development. Reactive colors get a stabilizer dip to lock the shade before drying.

5Protective Topcoat

Gold-family colors get clear e-coating or lacquer — without it, copper in the alloy tarnishes within months.

Key Parameters
E-coat: 15–25 μm, cure 160–180 °C

6Color QC

Spectrophotometer on every batch, compared to the master swatch under D65 light. Batch ships only at ΔE ≤ 1.0.

Key Parameters
Tolerance: ΔE ≤ 1.0
Light source: D65 standard
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Color Systems Compared

Pick by look, durability and budget

ColorAlloy SystemFinishDurabilityBest For
Rose GoldAu-Cu (75–85% Au)Bright warm pinkHigh w/ topcoatFashion jewelry, luxury bags
ChampagneAu-Ag-CuSoft goldenHigh w/ topcoatWatches, premium hardware
Black NickelNi-SnSatin-blackVery highTactical, modern gear
Gun MetalNi-Sn alloySemi-bright greyVery highSports equipment
Pearl NickelMicroporous NiSatin pearlHighPremium handbags
Antique BronzeCu-Sn + oxideAged matteMedium (sealed)Vintage furniture hardware
Antique CopperCu + oxideAged copperMedium (sealed)Retro designs
Matte GoldAu matteNon-glare goldHighMinimalist luxury
⚠ Special colors drift fastA ±2 °C bath swing or 0.2 pH drift visibly shifts rose gold. We log temperature and pH every 2 hours during color runs. Antique finishes are designed to keep aging; that patina is the look, not a defect.

📌 Special Color Cheat Sheet

Color flash time30–120 s
Bath temp window45–55 °C
Current density0.5–1.5 A/dm²
Color toleranceΔE ≤ 1.0
Rose gold alloy75–85% Au
Topcoat cure160–180 °C / 20–30 min

FAQ

Do special colors cost more?
Yes — expect 20–50% over standard nickel. Gold-family colors carry precious-metal cost; gun metal and black nickel are mid-range.
Will rose gold tarnish?
Not with our e-coat topcoat — the clear layer isolates the alloy from sweat and air. Untopcoated rose gold will darken in months.
Can you color-match our existing supplier parts?
Yes. Send 2–3 sample parts; we match to ΔE ≤ 1.0 and keep a master swatch for future batches.
MOQ for custom colors?
3000 pcs — the bath must be formulated and tested specifically for you.

Get a Free Quote Today

Send us your samples or drawings — our engineers reply within 24 hours with pricing and technical advice.

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