Case Study: Mass Production of Cross Pendants for Dutch Client – JINGYING’s CAD-to-Finish Manufacturing Process

Large-Scale Custom Orders of 18k Gold and Zirconium Stone Crosses by Spanish Clients at JINGYING

Table of Contents

  1. Executive Summary
  2. Project Overview: Dutch Client’s Custom Cross Pendant Order
  3. Understanding the European Religious Jewelry Market
  4. Technical Analysis of Provided CAD Files
  5. Material Selection & Compliance Considerations
  6. Production Workflow at JINGYING
  7. Quality Control Protocols
  8. Packaging & Branding Solutions
  9. Logistics & Customs Clearance
  10. Market Performance & Client Feedback
  11. Lessons Learned & Process Improvements
  12. Conclusion: Key Takeaways for CAD-Based Jewelry Production

1. Executive Summary

This whitepaper examines JINGYING’s complete manufacturing process for a Dutch jewelry retailer’s order of 25,000 sterling silver cross pendants. The project showcases:

  • CAD file optimization for mass production
  • EU compliance in religious jewelry manufacturing
  • Efficient scaling from prototype to bulk delivery
  • Solutions for common cross pendant production challenges

2. Project Overview

Client Profile:

  • Established Amsterdam-based Christian jewelry retailer
  • Annual turnover €4.2 million (2023)
  • Specializes in minimalist religious jewelry

Order Specifications:

  • Quantity: 25,000 units
  • Material: 925 sterling silver
  • Dimensions: 28mm × 18mm × 1.2mm
  • Finish: High-polish with optional oxidation
  • Delivery: 3 phased shipments over 5 months

3. European Religious Jewelry Market Analysis

Key Statistics:

  • €380 million market value in Western Europe (2024)
  • 62% of Christian jewelry buyers prefer sterling silver
  • Netherlands accounts for 18% of EU religious jewelry sales

Design Trends:

  • Minimalist crosses (75% of sales)
  • Combination of modern and traditional elements
  • Demand for unisex designs

4. CAD File Technical Assessment

Initial File Analysis:

  • Software: Rhino 3D (version 7)
  • File format: .3dm with 0.05mm tolerance
  • Required modifications:
    • Wall thickness increased from 0.8mm to 1.0mm
    • Bail reinforcement added
    • Engraving depth standardized

Optimization Process:

  1. Design for Manufacturing (DFM) review
  2. Stress point analysis
  3. Mold flow simulation
  4. Final approval cycle (3 iterations)

5. Material Selection & Compliance

Material Specifications:

  • 925 sterling silver (92.5% Ag, 7.5% Cu)
  • Nickel-free alloy composition
  • Sourced from LBMA-approved refineries

Compliance Documentation:

  • REACH certification
  • Nickel Directive 2004/96/EC compliance
  • Conflict Minerals Policy adherence

6. Production Workflow

Stage 1: Prototyping

  • 3D printing (wax resin)
  • Casting verification samples
  • Client approval process

Stage 2: Mass Production

  1. Rubber mold making (50 cavities/mold)
  2. Wax injection (automated system)
  3. Investment casting (vacuum assisted)
  4. Deburring & pre-polishing
  5. Laser engraving (client’s Bible verse)
  6. Final polishing (magnetic tumbling)
  7. Rhodium plating (optional)

Production Capacity:

  • 1,200 units/day (single shift)
  • 85% first-pass yield rate

7. Quality Control Matrix

Checkpoint Method Standard
Dimensional accuracy Optical comparator ±0.1mm tolerance
Silver purity XRF testing 92.5-93.5% Ag
Surface defects 10x magnification Zero visible flaws
Engraving depth Depth gauge 0.3mm ±0.05
Bail strength 5kg pull test No deformation

8. Packaging Solutions

Primary Packaging:

  • Anti-tarnish strips in individual pouches
  • Custom branded insert cards (FSC-certified paper)

Secondary Packaging:

  • 100-unit display trays
  • Export-grade cartons with humidity indicators

9. Logistics Management

Shipping Details:

  • Incoterm: FOB Shanghai
  • Lead time: 35 days production + 18 days transit
  • Customs clearance:
    • HS code: 71131110
    • Import duty: 3.2% (EU preferential rate)

Supply Chain Risks Mitigated:

  • Dual sourcing for silver grains
  • Buffer stock for 15% overproduction
  • ATA Carnet for sample shipments

10. Market Performance

Retail Metrics:

  • MSRP: €79-€129
  • Sell-through rate: 68% in first quarter
  • Bestseller ranking: #3 in client’s 2024 catalog

Client Feedback:
“JINGYING’s technical team transformed our design into a manufacturable product without compromising aesthetics. Their DFM suggestions improved durability by 40%.”

11. Process Improvements

  1. Implemented automated engraving verification system
  2. Reduced wax waste by 22% through mold redesign
  3. Cut polishing time 30% with new abrasive compounds

12. Conclusion & Key Takeaways

Successful Project Outcomes:
✔ Delivered 25,134 units (0.5% over-delivery)
✔ Achieved 99.2% on-time delivery
✔ Maintained 0% quality complaints

Recommendations for Similar Projects:

  1. Conduct DFM analysis before finalizing CAD
  2. Build 10% extra units for quality buffer
  3. Plan for 3-4 prototype iterations
  4.  
Post time: May-27-2025