Top Jewelry designed and produced a promotional keychain for KÉRASTASE, a premium professional haircare brand under L’Oréal, as part of a Gift-with-Purchase (GWP) campaign. This case covers the end-to-end process—from two initial design concepts to the delivery of 8,600 finished units—including material and process selection, REACH environmental compliance, and a 30-day production timeline. It serves as a practical reference for procurement professionals working with leading beauty brands.
Project Background & Key Requirements
As a high-end professional haircare brand, KÉRASTASE has clear expectations for brand alignment and quality in promotional accessories. For this GWP campaign, the client outlined the following core requirements:
Design Fidelity: Finished products must closely match the visual and structural details of the design mockups.
Environmental Compliance: Products must meet REACH certification standards and meet the requirements of being lead-free and cadmium-free, as well as nickel release.
Cost control: Unit costs must align with the client’s budget while maintaining a premium look and feel.
Design & Development Process
We engaged deeply in product development based on KÉRASTASE’s visual identity:
Concept Presentation: Delivered two distinct design options for client review.
Sampling Timeline: Completed prototyping within 7–10 days after finalizing one concept.
Refinement Cycles: Conducted four rounds of adjustments to fine-tune details, proportions, and color accuracy before approving the final version for mass production.
Production Challenges & Solutions
During sampling and trial production, the main challenge was the intricate and detailed structure of the design, featuring dense lines with varying depths. Traditional enamel filling often resulted in air bubbles or uneven coating, leading to low yield rates.
Solution: After consulting with the client, we adjusted the production approach by combining background enamel filling with UV printing for detailed patterns. This maintained the design’s color depth while improving production stability and yield.
Material Selection & Technical Specifications
To balance durability and cost-effectiveness, we adopted production-grade manufacturing solutions:
Main Material: As an experienced OEM keychain supplier, we selected zinc alloy for its low melting point and high fluidity, enabling precise dimensional control (±0.02mm) for a 2.5×5.5cm item, ideal for complex surface treatments.
Plating Process: Copper base plating followed by rhodium-like plating using CU and SN materials, with a controlled thickness >45μm to prevent fading and oxidation during daily use.
Surface Finish: Combined enamel filling and UV printing to ensure design accuracy and production efficiency.
Quality Control Standards
Beyond meeting brand visual standards, we implemented additional checks for export and internal brand compliance:
Environmental Testing：: All materials comply with REACH standards and pass third-party lead free cadmium free and nickel release tests.
https://echa.europa.eu/regulations/reach
– REACH/EN1811/EN12472: Nickel release <0.5μg/cm²·week (for non-piercing jewelry).
– REACH/CPSIA-Pb: Lead content <100ppm.
Durability Testing: Plating layers undergo a 48-hour salt spray test (ISO 7253-2002/ASTM B368-09/ISO 9227-2006), achieving a corrosion resistance rating of 10/10 (passing grade: 6).
Full Manual Inspection: Enamel-filled areas undergo 100% inspection based on a three-tier defect classification:
– Color bleeding: Rejected if overflow exceeds 0.2mm beyond pattern edges.
– Air bubbles: Rejected if more than one bubble ≥0.3mm in diameter is present, or if visible dense pinholes occur.
– Discoloration: Rejected if foreign color spots ≥0.2mm appear in brand-designated areas.
Each item undergoes a 3-second preliminary check followed by a 5-second magnifying glass review to ensure compliance with KÉRASTASE’s quality standards.
Finished Product Showcase
The KÉRASTASE multi-charm metal keychain features enamel craftsmanship depicting a perfume bottle, the letter “K,” and poppy elements. Its warm brown color scheme aligns with the brand’s identity. Each charm measures approximately 2cm, with a total length of about 8cm, making it suitable as a bag accessory—both decorative and collectible.
What are the exact dimensions of the custom keychain?
Each charm measures approximately 2cm, with a total product length of about 8cm.
What is the minimum order quantity for customization?
The minimum order quantity is 500 pieces per design, adjustable based on design complexity and client needs.
What is the timeline from design to delivery?
The full process takes 30 days.
Do you offer environmentally friendly materials?
Yes, we provide options such as stainless steel, tin alloy, copper, silver,
and other eco-friendly recycled materials.
How do you ensure quality consistency for luxury brand custom promotional gifts?
We follow a strict system including design verification, pre-production samples, 100% inspection, and third-party compliance testing. For luxury brands like KÉRASTASE, we maintain high standards for plating, enamel, and dimensional accuracy.
If you are looking for a reliable custom logo keychains bulk supplier for beauty or luxury brand GWP campaigns, we offer free design evaluation, sample support, and transparent pricing based on your MOQ and timeline. With 28 years of experience serving L’Oréal, LVMH, and Dior, we can support your OEM/ODM projects with full compliance and on-time delivery.
Edited by Amy
