Email: sales3@zhefanjewelry.com
Uncompromising Quality Control by Leading High Quality Jewelry Manufacturers
At ZHEFAN JEWELRY, our Quality Control ensures every piece of 925 silver and brass jewelry meets the highest standards. With over two decades of craftsmanship expertise, we guarantee precision and durability, supporting your brand’s growth through consistent excellence and customer satisfaction.
How does ZHEFAN JEWELRY control its quality?
At ZHEFAN JEWELRY Factory, quality control is rooted in uncompromising standards—where every piece undergoes 6 rounds of high-precision polishing for a flawless finish, premium electroplating for long-lasting luster and corrosion resistance, and 6 strict quality inspections throughout the production process. This triple commitment to meticulous polishing, superior plating, and rigorous quality checks ensures each jewelry item meets the highest industry benchmarks.
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The 12-Step Manufacturing & Inspection Jewelry Process
We define what it means to be high quality jewelry manufacturers through our meticulous 12-step execution workflow:
Zircon
Natural Stone
Moissanite
Pearl
Opal
Brass
925 Silver
01. Raw Material Inspection
Strictly control the purity of metals and gemstones, ensuring quality from the source.
02. Wax Model Inspection
Check the dimensions and details of the wax model
03. Hand Polishing
Initial Polishing: Finish & polish cut-off cast copper bases; smooth cut-off sprues & other rough areas
04. Machine Polishing
Comprehensive refined polishing on every part of the copper bases with precision
05. Quality Inspection After Machine Polishing
Surface Smoothness, Sand Holes & Missing Small Stones Inspection
06. Hand Polishing
After QC, poorly polished local areas were touched up via hand wheel buffing
07. Quality Inspection After Stone Setting
Inspect whether the stones are securely set and their positions are correct
08. Hand Polishing
After main stone setting, black spots, pinholes, scratches & prong marks on prongs are fixed with muslin wheel buffing
09. Quality Inspection After Manual Polishing
Surface smoothness inspection: sand holes & missing stones check
10. Hand Polishing
Post-setting filling & polishing: re-inspect edges / corners, claws, double-layer lines & detailed spots
11. Hand Polishing
Pre-plating flax wheel polishing (check for roughness and pitting)
12. Quality Inspection After Hand Polishing
Inspect plating color accuracy, stone retention, surface scratches and other defects
Polishing Comparison
Zhefan Factory
more than 6 time polish
1 machine polish+5 hand polish
6 time QC
VS
Other Factory
1 time machine polish
1 time QC
Zhefan Factory
more than 6 time polish
1 machine polish+5 hand polish
6 time QC
VS
Other Factory
1 time polish
1 time QC
ZhefanJewelry Plating
We cooperate with a professional plating factory in which zhefanjewelry holds shares. This strategic partnership enables us to ensure the best quality for customers and offer more competitive prices. The plating undergoes 5 layers of processing.
Ever bought "gold-plated" jewelry that turned black or caused skin irritation after weeks? You might’ve encountered imitation gold plating—and today, we’re spilling the tea from a factory’s perspective!
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What’s Imitation Gold Plating?
It has NO real gold at all! Mostly made with brass-zinc alloy to copy gold’s color.
❌ Oxidizes, fades, or turns black fast during daily wear.
❌ Problem 2: Risks skin allergies (especially for sensitive skin!).
💢 Total waste of money—we all hate that, right?
What’s Genuine Gold Plating?
The real deal! Uses pure gold/karat gold for coating, with strict process control at every step. Perfect for mid-to-high-end jewelry! It’s split into two types, and thickness matters BIG TIME:
✅ Regular Gold Plating: 0.02-0.03μm thickness → Color retention for 3-6 months.
✅ Thick Gold Plating: Over 0.05 μm thickness → Longer shine (the thicker, the longer!) + higher quality.
Why Choose ZHEFAN as Your Premier Custom Jewelry Manufacturer?
We don’t cut corners—our gold plating is certified safe & long-lasting!
Hydrochloric acid test
No issue if product retains color after 3-minute potassium sulfide soak.
Our products remain bright and clear after soaking in 5% potassium sulfide for 10 minutes
Eco & Skin-Safe
Passed ROHS & REACH! Lead-free, nickel-free, cadmium-free—safe even for sensitive skin. Also passed the 10-level salt spray test, which represents the high corrosion resistance grade of the jewelry's electroplated layer.
Custom Thickness + Free Test Reports
Need 0.03μm for daily jewelry or 0.1μm for luxury pieces? We tailor it! Plus free reports to prove quality.
German Tech Shine
Imported German equipment + 30% concentration real gold (plated for 15 mins!). Color retention is 5x longer than market standards—shiny for YEARS!
Premium Gold Plating Process for Long-Lasting Private Label Jewelry
Quality is in the layers. As a dedicated Custom Jewelry Manufacturer, we apply a rigorous process—from acidic copper base to final precious metal coating (Gold/Rhodium)—ensuring your products pass the 10-level salt spray test and remain tarnish-resistant for years.
Brass Jewelry Electroplating Process
Whether it is silver plating, rhodium plating or gold plating, we will add an anti-oxidation protective film for protection to prevent the products from being easily oxidized and discolored.
Standard Process
Brass (raw material) ➨ Acidic Copper Plating (Copper plating helps with electroplating color development) ➨ Polishing ➨ Secondary Acidic Copper Plating ➨ Copper-Tin Alloy Plating (serves to brighten the color) ➨ Rhodium Plating (approx. 0.02μm) / Gold Plating (approx. 0.03μm) (Palladium plating is also an option) ➨ Rhodium Plating (approx. 0.02μm, may be relatively expensive)
👉 All brass silver-plated jewelry
Brass (raw material) - Copper Plating - Polishing - Secondary Copper Plating - Polishing - Palladium & Silver Plating - Coating
👉 All brass rhodium plated jewelry
Brass (raw material) - Copper Plating - Polishing - Secondary Copper Plating - Polishing - Palladium & Silver Plating - Rhodium Plating - Coating
👉 All brass gold-plated jewelry
Brass (raw material) - Copper Plating - Polishing - Secondary Copper Plating - Polishing - Palladium & Silver Plating - Gold Plating - Coating
925 Silver Jewelry Electroplating Process
👉 Gold Plating
Thick Silver Plating, Polishing, Secondary Thick Silver Plating, Gold Plating, Electrophoretic Coating (like a film on the surface, better protecting the jewelry)
👉 Rhodium Plating
Thick Silver Plating, Polishing, Secondary Thick Silver Plating, Palladium Plating, Secondary Rhodium Plating.
Connect with Your Trusted Custom Jewelry Manufacturer
If you have any questions or concerns regarding the quality of our jewelry products, please fill out the form below.
Our Quality Control team at ZHEFAN JEWELRY is dedicated to ensuring the highest standards in every piece we produce.
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From design to production, ZHEFAN JEWELRY offers a one-stop solution to help you enhance your brand value and market competitiveness.
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Contact
Tel: (+86) 188 1927 7817
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