Quality Management

Zhantai's internal quality management team consists of rigorous professionals who look at our products with stricter standards than our customers through operational and management excellence.

Quality Policy

Do not procure defective products
Do not make defective products
o not have defective product flow

Quality Objective

High quality raw materials
Good quality process
Make quality glasses

Third party certification

ISO9001
FDA
BSCI

Quality Center

Quality Center (QA) is mainly responsible for the operation and management of the quality system, for the company's product quality stability upward to do the overall organization work.

Raw material management

IQC

Supply chain management

SQM

Do the first quality control and deliver high quality raw materials to the field.

In process quality control

IPQC

Responsible for quality management in eyewear manufacturing, Whole process quality control, and continuous improvement of our products.

Independent testing laboratory

Responsible for testing whether the quality of products meet the corresponding national requirements.

Finished product quality management

FQC

Responsible for the quality of delivery and the final quality control in the company from the customer's standpoint.

Zhantai Pyramid

Combined with the corporate culture

Zhantai Pyramid

Certificates

Certificates
Category Certification Core Focus Market Value & Significance
Market Access CE / UKCA EU & UK Safety & Environmental Directives Mandatory passport for exporting sunglasses and frames to European and UK markets.
FDA U.S. Medical Device Registration Ensures products meet U.S. FDA regulatory standards as Class I Medical Devices.
ISO 13485 Medical Device Quality Management Demonstrates the ability to manufacture high-precision optical products to medical-grade standards.
Social Responsibility BSCI / SMETA International Labor & Ethical Business Audits The core threshold for partnership with global retailers and premium fashion groups.
DISNEY (FAMA) Disney Global Social Compliance Authorized to produce Disney-branded goods, meeting the world’s strictest human rights & safety codes.
Quality & Operations ISO 9001 Quality Management Systems (QMS) Guarantees that every step from raw material to final shipping is controlled and traceable.
ISO 45001 Occupational Health & Safety Ensures a safe working environment, reducing operational risks and ensuring stable production.
Sustainability GRS Global Recycled Standard Verifies recycled content and traceability; essential for Eco-friendly & Sustainable eyewear orders.
ISO 14001 Environmental Management Confirms the factory’s commitment to energy efficiency and Green Manufacturing compliance.
Supply Chain Security SCAN Supplier Compliance Audit Network Meets the Customs-Trade Partnership Against Terrorism (C-TPAT) requirements for major U.S. retailers.

Lens Inspection

Lens Inspection Category Test Item Standard & Technical Core Client Value / Purpose
Optical Precision Optical Power (Diopter) Testing for Spherical, Astigmatic, and Prismatic power. Ensures crystal-clear vision without distortion or dizziness.
Polarization Efficiency Verification of polarizing axis and efficiency (%) levels. Eliminates glare and reflections for high-contrast outdoor vision.
Safety & Protection UV Protection (UV400) Full blockage of UVA and UVB rays up to 400nm. 100% eye protection against long-term ultraviolet damage.
Drop Ball Test Compliance with FDA 21 CFR 801.410 impact standards. Verifies lens durability to prevent shattering upon impact.
Visual Performance Luminous Transmittance Classification from Cat 0 to Cat 4 (ISO 12312-1). Guarantees consistent tint density and specific light-use safety.

Frame Inspection

Frame Inspection Category Test Item Standard & Technical Core Client Value / Purpose
Durability Endurance / Fatigue Test 5000+ cycles of continuous temple opening/closing. Ensures hinges remain smooth and reliable without breaking over time.
Bridge Deformation Assessment of frame flexibility and recovery under pressure. Guarantees the frame retains its original shape after accidental stress.
Environmental Perspiration Resistance Long-term immersion in simulated acidic/alkaline sweat. Prevents coating peeling, fading, or corrosion caused by skin contact.
High-Temp Stability Sustained exposure to 55°C (131°F) environments. Ensures frames do not warp, soften, or discolor in extreme heat (e.g., inside a car).
Safety Nickel Release Test Compliance with European EN 16128 safety standards. Limits nickel release in metal frames to prevent skin allergies and irritation.
Resistance to Ignition Tested against high-temperature heat sources. Ensures materials (especially Acetate) are flame-retardant for user safety.

Professional Service Process

OEM/ODM service

Learn about the cooperation process
FAQs

Q1: What is your production capacity for OEM/ODM sunglasses orders?

Our total annual output exceeds 20 million pieces. For our primary injection styles, our capacity is between 800,000 and 1,000,000 pieces per month, while our metal production lines output 400,000 to 600,000 pieces per month. This large-scale capability allows us to support high-volume orders for global supermarkets and chain stores reliably.

Q2: What kind of customization services do you provide for fast-fashion brands?

We offer a complete product and packaging one-stop service. Our R&D team develops over 50 new sample designs per month based on market research and trend analytics. We fully support custom frames, lenses, and LOGO customization to match your exact brand identity.

Q3: How long is the typical lead time for samples and bulk production?

We pride ourselves on speed and efficiency. We offer fast sample-making within 7 to 15 days. If your project requires a new mold, it typically takes 20 to 30 days. For bulk order production, our standard lead time is 30 to 60 days.

Q4: Do your sunglasses meet international quality and safety standards?

Absolutely. We strictly follow quality control steps from raw materials (IQC) to finished products (OQC). Our factory and products hold comprehensive professional qualification certificates, including CE, FDA, ISO 9001, ISO 13485, BSCI, SMETA, and the Global Recycled Standard.

Q5: Do you have experience working with major global retailers?

Yes, Wenzhou Zhantai Glasses has over 30 years of company history and extensive experience manufacturing for top supermarkets, ecommerce platforms, and global brands. Our recognized quality control has earned us partnerships with industry leaders like Walmart, Disney, Muji, Safilo, and QUAY. By working with us, you receive factory prices with no middlemen.

Q6: What types of eyewear materials do you manufacture?

We work with a wide variety of materials across our 3 production lines. Our capabilities include injection PC and TR, metal, acetate, and eco-friendly materials. This diverse material expertise allows us to meet the specific price points and design requirements of different fast-fashion brands and supermarkets.

Q7: What are your main product categories?

Our main products are sunglasses, optical glasses, and reading glasses. While we specialize in injection sunglasses for retail chains, we also have dedicated production lines for optical frames and reading glasses to provide a comprehensive eyewear catalog.

Q8: What is your Minimum Order Quantity (MOQ)?

As an OEM/ODM factory focusing on large-scale production, our standard MOQ is 1200 pieces per model for 3-4 colors. However, we offer flexible solutions for trial orders or specific customization needs. Please contact our sales team to discuss your project.

Q9: Do you have manufacturing facilities outside of China?

Yes, we do. In addition to our main 10,000-square-meter headquarters in Wenzhou, China, we also operate a specialized manufacturing facility in Thailand. Having a dual-country production strategy allows us to provide our global clients with highly flexible supply chain solutions, optimize import logistics, and mitigate international trade risks (such as tariffs). This ensures uninterrupted, high-capacity delivery for major supermarkets and brands.

Q10: What is your company’s background and manufacturing scale?

Wenzhou Zhantai Glasses was founded in 1990, giving us over 30 years of deep expertise in eyewear manufacturing. Our headquarters covers a construction area of over 20,000 square meters and employs more than 500 skilled workers. Thanks to the trust of our global clients, we maintain a highly stable operational status; our annual turnover continues to grow steadily, reaching $40 million in 2025, with a projected figure of $45 million in 2026. We are a financially strong and scalable partner ready for long-term collaboration.

Get in touch

Let’s build your vision together. Backed by 30 years of manufacturing excellence, Zhantai Glasses offers the quality and customization your brand needs to stand out. From concept to global distribution, we handle the details so you can focus on growth.

Let's collaborate for exceptional eyewear. We look forward to a meaningful collaboration.

Wenzhou Zhantai Glasses

Beiwei No.2 Street, Ouhai District, Wenzhou City, Zhejiang Province, China.

[email protected]