Quality Control
Quality Control Specification | Guangzhou Z-Z Advertising Equipment Co., Ltd.
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Raw Material Control: Source Selection & Incoming Inspection, Reject Substandard Materials
- Acrylic for LED Luminous Letter & LED Light Box: Use 100% virgin imported Mitsubishi acrylic, inspect material certification, light transmittance and anti-aging performance before warehousing.
- Aluminum profiles: Use national standard full-thickness profiles, strictly reject substandard 0.8mm thin profiles in the industry, test thickness and hardness batch by batch.
- LED light sources: Select high-end domestic brands such as BlueView and Future LED, with 3-years warranty; sample inspection for brightness, light decay and working stability.
- Power supplies: MeanWell power supplies, with 5-year warranty; special test for withstand voltage, overload protection and continuous working performance.
- Foam boards and aluminum composite panels: Select premium-grade materials in the industry, inspect flatness, density and weather resistance before warehousing.
- Implement zero non-conforming raw materials warehousing rule, establish batch traceability records to strictly control source quality for LED luminous letters and LED light boxes.
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Manufacturing Process: Ingenious Production & Process Inspection, Solid Finished Product Foundation
- Bending, polishing and welding processes for LED luminous letter and LED light box are operated by skilled masters with over 5 years of experience, ensuring flawless craftsmanship.
- CNC precision cutting to control size error, conduct special precision inspection after each process.
- Inspect welding and splicing parts one by one to ensure firmness, seamless connection, no burrs and flat appearance.
- Standardized assembly process, inspect structural stability, tightness and uniform light emission of LED luminous letters and LED light boxes.
- Balance precision and creative design, conduct dual inspection on appearance and function, and only qualified products can flow to the next process.
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Finished Product Inspection: Full-item Verification & Aging Test, Strict Factory Quality Control
- 100% full inspection on lighting effect of finished LED luminous letter and LED light box, eliminate dark areas, stroboscopic and color difference defects.
- Conduct power-on aging test, simulate long-term use scenarios to test the stability of light sources and power supplies.
- Special inspection on waterproof, dustproof and wind resistance performance for outdoor LED luminous letters and LED light boxes, ensuring adaptability to outdoor environments.
- Comprehensive inspection on appearance details, check paint finish, wire drawing and edge treatment to meet high-end signage standards.
- Implement zero non-conforming finished products delivery rule; products can enter the packaging link only after re-inspection qualification.
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Packaging Protection: Multi-layer Reinforcement & Delivery Verification, Guarantee Damage-free Delivery
- Paste special protective film on the surface of LED luminous letters and LED light boxes to prevent scratches and abrasions.
- Install pearl cotton and anti-collision corner protectors on fragile edges to cushion transportation vibration.
- Adopt high-strength carton + solid wood frame for outer packaging, suitable for long-distance logistics transportation.
- Verify packaging firmness before delivery, paste warning signs to ensure intact goods arrival.
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After-sales Service: Full-cycle Support & Rapid Response, Worry-free After-sales
- Strictly implement 3-year warranty for LED light sources and 5-year warranty for Mean Well power supplies for all LED luminous letters and LED light boxes.
- Rapid response and efficient handling for non-human-induced quality problems, solving customers' worries.
- Provide professional pre-sales selection guidance, real-time production progress follow-up during sales, and long-term after-sales maintenance.
- 18 years of industry accumulation, build high-end signage products with strict quality control, and realize full-process quality traceability.
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