How are frame quality issues handled after shipment? Short answer: After shipment, frame quality issues are usually handled through a clear claim process. The buyer submits evidence, the factory reviews it against AQL and agreed specifications, and then a resolution follows—replacement, refund, credit, or repair. Clear timelines and defect definitions help both sides avoid disputes. Frame...

Do optical frames require FDA 510(k) clearance? Short answer: In most cases, no. Standard optical frames are generally not classified as medical devices by the FDA, so they usually do not require 510(k) clearance. However, prescription lenses, certain sunglasses, and products with medical claims may fall under FDA rules. Always check the FDA product classification database for your exact pro...

What does frame durability testing involve? Short answer: Frame durability testing involves mechanical, chemical, and visual checks that simulate real-world use. It usually covers hinge fatigue, frame strength, lens rim stability, corrosion resistance, sweat exposure, coating adhesion, and finish wear. The aim is to confirm that eyeglass frames can survive daily handling, shipping, and long-...

What is an acceptable defect rate for frames? An acceptable defect rate for eyeglass frames depends on the AQL level agreed between buyer and factory. For most wholesale orders, AQL 2.5 for major defects and AQL 4.0 for minor defects is the industry standard. This means a batch is acceptable if the sample shows defects below those limits. Anything above is rejected o...

What is the warranty on wholesale eyeglass frames? Most wholesale eyeglass frames carry a 12-month warranty from the date of shipment, covering manufacturing defects such as broken hinges, loose welds, plating failure, and structural cracks. The warranty does not cover accidental damage, normal wear, or improper use. Claim terms, coverage scope, and replacement polic...

How do I verify an eyewear manufacturer is legitimate? To verify an eyewear manufacturer is legitimate, check five things: legal registration, factory address, live video tour, production records, and third-party certificates. Legitimate factories will provide all five without hesitation. Scam suppliers avoid video calls, use vague addresses, and demand full payment ...

What is an eyewear factory audit and why does it matter? An eyewear factory audit is an independent on-site evaluation of a supplier's production capacity, quality management system, social compliance, and traceability. It answers one core question: can this factory consistently produce the approved product on schedule, with documented evidence? For importers and eye...

What quality tests are done on eyeglass frames? The main quality tests on eyeglass frames are hinge fatigue testing, salt spray corrosion testing, nickel release testing, tensile and drop testing, sweat resistance, color fastness, and dimensional stability. These tests confirm that a frame can survive daily wear, meet market regulations, and protect brand reputation. For B2B buy...

How do I check the quality of eyeglass frames? To check the quality of eyeglass frames, inspect six points: hinge action, weld joints, surface finish, frame alignment, screw tightness, and material feel. A quality frame opens smoothly, sits flat, has clean edges, and shows no gaps or rough spots. For B2B buyers, a written inspection checklist plus AQL sampling reduces returns an...

How long do eyeglass frames last? Most eyeglass frames last between two and five years with normal daily wear. Acetate and TR90 frames typically last three to five years. Metal frames such as titanium and stainless steel can last longer, often five years or more. Actual lifespan depends on material, hinge quality, surface finish, and how the frame is used. READSUN applies strict quality cont...

Are acetate frames durable? Yes, acetate frames are durable when the material grade and production quality are correct. High-quality cellulose acetate is strong, flexible, and resistant to daily wear. It can be polished and repaired, which extends its life. Acetate frames typically last three to five years with normal use. READSUN Optical uses quality-controlled acetate and strict testing to...

How long do acetate frames last? Acetate frames typically last three to five years with normal daily wear. With careful use and good maintenance, many frames last longer. The exact lifespan depends on the acetate grade, hinge quality, surface finish, and how the frame is worn and stored. Low-grade acetate with weak hardware may fail in one to two years. READSUN Optical produces quality-contr...

Orders are fully tracked through READSUN’s digital milestone management system. Production is scheduled by key process, with materials and components tracked, and exceptions handled promptly to ensure on-time delivery.

Yes. READSUN supports third-party pre-shipment inspections to ensure products meet required standards.

READSUN verifies issues within 48 hours and provides replacement or compensation solutions. Pre-production trials prevent major structural or quality issues. Defective items during production are reworked; severe issues that cannot be reworked are remade or repaired.

READSUN implements dedicated QC checkpoints on each material production line. Production follows standard operating procedures, with first-article inspection on key processes and in-line sampling or full inspection. Defective products are reworked before proceeding. Final products undergo required testing to ensure full quality control. ...