Quality Control
At OAHLAN, our quality control system is built to support stable wholesale production and responsible export compliance. For jewelry projects intended for Europe, our QC workflow is designed around risk prevention, process control, documented inspection, and chemical compliance review before shipment.
Our internal quality framework focuses on four priorities: material accuracy, appearance consistency, functional reliability, and compliance readiness.
Our QC Standard
We structure our quality process around internationally recognized quality management principles and product safety expectations for consumer goods. For applicable projects, our QC workflow can be aligned with EU market requirements such as REACH chemical restrictions and the General Product Safety Regulation (GPSR), together with agreed buyer specifications.
QC Control Points
1. Raw Material Verification
- Check incoming metal, stone, plating, and accessory materials against approved order specifications
- Confirm core material requirements before production starts
- For 925 sterling silver projects, verify fineness against the approved standard or test plan
- Separate approved and unapproved materials to avoid line mix-ups
2. Pre-Production Review
- Confirm product drawings, sample references, dimensions, plating color, stone type, logo position, and packaging details
- Review risk points before production, including fragile structures, sharp edges, loose settings, plating mismatch, and size tolerance
- Approve a sample or pre-production reference before bulk order when required
3. In-Process Inspection
- Monitor critical steps such as casting, forming, stone setting, polishing, plating, engraving, and assembly
- Use checkpoint inspections during production instead of relying only on final inspection
- Isolate non-conforming items for rework or rejection
4. Final Inspection Before Packing
- Check quantity, style, size, finish, color tone, logo details, and packaging accuracy
- Inspect visible defects such as scratches, dents, pits, bubbles, plating marks, glue residue, and stone misalignment
- Verify ring size consistency and key dimensions against approved tolerance
- Confirm barcode, label, and assortment accuracy for wholesale and retail packing
Appearance and Workmanship Standards
- Smooth and even surface finish
- Consistent plating tone across the same order
- No sharp edges or unsafe burrs on accessible areas
- Clean soldering and assembly points
- Secure stone setting with no visible looseness
- Accurate engraving placement and legibility
- Packaging that protects products from scratching, oxidation, and transport damage
Chemical Compliance Review for EU-Focused Orders
For products intended for the EU market, our QC review can include compliance screening against relevant REACH restrictions and general product safety expectations. Depending on the product type and buyer request, this may include third-party lab testing, supplier declarations, and material trace review.
| Control Item | QC Focus |
|---|---|
| Nickel Release | For applicable jewelry in direct and prolonged skin contact, review to EU nickel release limits and test planning where required |
| Lead Content | Review restricted lead levels in jewelry parts for EU-focused projects |
| Cadmium Content | Review restricted cadmium levels in relevant metal components and jewelry articles |
| Product Safety File | Maintain order records, inspection records, material information, and test documents as agreed for compliance support |
925 Sterling Silver Verification
For sterling silver projects, quality control should not stop at appearance. Our QC workflow can include fineness verification based on the order requirement, supported by appropriate test methods and material records. Where needed, non-destructive or laboratory confirmation can be arranged for finished items or production samples.
Plating Quality Control
- Confirm plating color against approved sample
- Check visual consistency within the same lot
- Inspect corners, edges, prongs, and hidden areas for plating coverage
- Review adhesion and surface cleanliness before packing
- Separate defective pieces showing discoloration, exposed base metal, blistering, or uneven tone
Stone Setting Quality Control
- Check stone size, color, and layout against approved sample
- Inspect prong security, alignment, and symmetry
- Perform manual checking for loose stones on selected items
- Reject pieces with visible tilt, gaps, scratches, or instability
Dimensional and Size Control
- Verify ring sizes with calibrated tools
- Check width, thickness, and key dimensions according to approved tolerance
- Control variation within the same production lot
Packing and Shipment Control
- Use clean and separated packing flow to avoid mixed styles and mixed sizes
- Check quantity per bag, box, and carton before sealing
- Protect plated and polished items from scratching during transport
- Keep shipment records linked to batch and order number
Corrective Action Process
If a defect trend is identified, we apply a corrective action process that may include batch isolation, root-cause review, rework assessment, updated work instruction, and added inspection at the affected step. This helps reduce repeat issues in future production.
Who This QC System Is For
- Jewelry brands that need more stable wholesale quality
- Retailers and importers selling into Europe
- Private label buyers requiring controlled specifications
- Projects where material consistency, plating finish, and stone security matter
FAQ
Do you test products for EU compliance?
For applicable projects, we can support compliance review and testing arrangements based on the product category, buyer requirement, and destination market.
Do you check nickel, lead, and cadmium for jewelry orders?
For EU-focused orders, these restricted substances can be included in the compliance review plan, together with supporting material records or third-party testing where required.
How do you control plating quality?
We check plating color, surface appearance, coverage, and visible finish consistency against the approved sample before packing.
How do you reduce loose stones and visible defects?
We use in-process inspection, final appearance checks, and targeted review of stone setting, polishing, and assembly points before shipment.
Can you support 925 sterling silver verification?
Yes. For sterling silver projects, fineness verification can be arranged according to the product requirement and agreed test method.
Need a QC-Ready Jewelry Supplier?
Contact our team to discuss your material standards, EU compliance expectations, inspection level, and testing requirements before production.
