Donghai Kemzo Quartz Products Co., Ltd. is located in the prominent industrial and coastal logistics hub of Lianyungang, Jiangsu, China. Recognized globally as China's crystal capital, Donghai County provides direct access to high-purity natural silica reserves, enabling our facility to maintain strict mineral batch consistency, short processing cycles, and competitive commercial terms.
Since our establishment in 2011, we have integrated raw material purification, thermal drawing, cold CNC precision machining, flame polishing, and cleanroom annealing into a unified manufacturing platform. Our core production includes high-purity quartz sand, transparent fused quartz tubes, opaque milky quartz shields, diffusion process tubes, precision ground-mouth joints, optical quartz plates, crucibles, sample boats, rods, and tailored labware for harsh chemical environments.
With an accredited ISO 9001 quality management system and recognition as a Jiangsu High Technology Enterprise, over 70% of our products are exported worldwide to qualified clients across North America, East Asia, Europe, and Oceania.
Our multi-tier infrastructure is engineered to satisfy rigorous international procurement requirements, from raw material formulation to sub-micron optical tolerance finishing.
Operating stabilized high-temperature drawing lines and rotary fusion equipment capable of producing standard and oversized transparent tubes up to 450 mm OD with tight wall uniformity, minimizing ovality and internal air lines.
Equipped with precision CNC slotting, automated flat lapping, cylindrical grinding, edge beveling, and ultrasonic drilling. We manufacture complex geometries, ground taper joints, and optical viewports strictly according to buyer CAD drawings.
Our QA/QC workflow implements total lifecycle testing from raw crystal verification to end-product stress polariscopes, spectrophotometric transmittance verification, and thermal shock stress relief testing.
Donghai Kemzo Quartz Products Co., Ltd. delivers engineered quartz products worldwide with robust logistics management and zero-breakage export packaging protocols.
Whether you require standard size replenishment or custom quartz components manufactured to technical drawings, our engineering team provides fast evaluations and competitive quotations within one hour.