What sizes of fused quartz tube can VEZLO produce?

Standard transparent fused quartz tubes are produced from 2 mm to 500 mm outer diameter. A 520 mm large-diameter high-purity quartz tube has also been developed for semiconductor diffusion and oxidation furnaces. Wall thickness, length and end finishing are made to drawing.

What is the difference between fused quartz and fused silica?

Fused quartz is made by melting high-purity natural quartz crystal or sand, while synthetic fused silica is produced from silicon-based precursors such as SiCl4. Synthetic silica offers higher deep-UV transmission, while fused quartz provides excellent thermal stability and purity at a lower cost for lamps, furnaces, labware and most industrial uses.

What is an ozone-free quartz tube?

An ozone-free quartz tube is doped to absorb the 185 nm ultraviolet line that converts oxygen into ozone, while still transmitting the 254 nm germicidal wavelength. It is widely used for UV sterilization lamps in water, air and surface disinfection where ozone is not wanted.

Do you accept OEM and ODM custom quartz parts?

Yes. VEZLO manufactures to customer drawings, including tubes with closed or flared ends, ground joints, flanges, quartz boats, cleaning tanks, crucibles, plates, windows and rods, as well as private-label packaging.

How fast does VEZLO respond to technical requests?

The average response time is within 2 hours, and around 50% of buyers place repeat orders. Requirements can be sent to info@vezloquartz.com or via the contact page.

How are fragile quartz products packed for export?

Quartz parts are typically protected individually with foam or pearl cotton, then packed in reinforced cartons or fumigation-free plywood cases suitable for sea, air and express shipping.

Nordic Industrial Procurement Guide · 2026 Edition

Top 10 Quartz Glass Plate Factories & Exporters Serving the Helsinki Market

A technical evaluation of high-purity fused silica and quartz plate manufacturers supplying precision optics, photonics, and semiconductor sectors across Greater Helsinki and the Uusimaa industrial corridor.

Precision Engineered Solutions

Featured Quartz Plates & Optical Substrates

Standard and customized fused silica plates engineered for demanding European industrial parameters, featuring ultra-low thermal expansion, deep-UV to NIR transmittance, and precision dimensional tolerances.

Drilled Quartz Plate Multi Hole Fused Silica CNC Machined Custom

Custom micro-hole drilling, pitch tolerance ±0.02 mm, smooth edge chamfers, semiconductor wafer processing & microfluidics.

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Rectangular Quartz Plate Fused Silica Clear Precision Cut Custom Size

Surface flatness λ/4 to 2λ, laser cutting & chamfering, double-side ground and polished, high visual clarity.

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Quartz Glass Sheet 10mm 20mm 30mm Thick Fused Silica Heat Resistant

Heavy-gauge plate withstands 1100°C continuous thermal load, annealed for zero internal stress, furnace linings.

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Quartz Glass Plate for Optical Window Fused Silica High Transmittance

Transmittance ≥92% (190 nm–2500 nm), 40/20 or 20/10 scratch-dig, spectroscopic analysis and UV sensor ports.

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Quartz Fireplace Viewing Glass Plate Heat Resistant Fused Silica

Zero thermal expansion micro-coefficients (5.5×10−7 /°C), extreme thermal shock tolerance from −40°C to 1000°C.

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Quartz Observation Window Plate Fused Silica High Pressure Clear

High mechanical rupture modulus, chemically resistant to boiling acids, autoclaves, high-pressure reaction vessels.

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Quartz Photomask Substrate Plate Fused Silica UV Grade Ultra Thin

Thickness down to 0.3 mm, bubble-free class 0, deep-UV lithography grade, ultra-low fluorescence and micro-roughness.

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Semiconductor Quartz Plate Fused Silica Substrate High Purity Custom

Total heavy metal impurities ≤20 ppm, chemical vapor deposition (CVD) carriers, precision CNC notch orientation.

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≥99.99%

SiO2 Purity Rating

≤20 ppm

Total Metal Impurities

±0.01 mm

CNC Machining Precision

≤2 Hours

Technical RFQ Response

Strategic Sourcing Analysis

Helsinki & Nordic Quartz Glass Demand Drivers

From the deep-tech research institutes of Otaniemi to industrial cleanrooms in Vantaa, Finnish engineering demands quartz plate specifications with zero compromise on micro-purity and thermal endurance.

The Greater Helsinki Metropolitan Area represents the northern European epicenter for advanced photonics, microelectronics, cryogenic measurement devices, and clean energy innovation. Unlike standard industrial glass markets, procurement directors across Helsinki, Espoo, and Vantaa operate under stringent European directives (CE, REACH, RoHS) while addressing unique operational challenges created by sub-arctic thermal cycling and high-precision quantum research.

Quantum & Semiconductor Lithography

Centering around VTT Technical Research Centre of Finland and the Micronova cleanroom facility, Finnish quantum chip designers utilize high-purity fused silica substrates with ultra-flat profiles (λ/10) and low-fluorescence characteristics for electron-beam lithography, cryogenic packaging, and quantum computing interfaces.

Deep-UV Grade Low OH- Content Cleanroom Class 100

Nordic Cleantech & Combustion Optics

Finland's progressive energy grid utilizes biomass combustion, industrial pyrolysis, and high-efficiency heat exchangers. Quartz observation windows operating continuously at 1100°C withstand sharp thermal gradients between sub-zero exterior temperatures and aggressive interior combustion atmospheres without crazing or devitrification.

1100°C Thermal Limit Thermal Shock Resistant Alkali-Resistant

Photonics, Laser & Spectroscopy

Supported by Photonics Finland, the regional cluster requires synthetic and optical-grade fused silica plates for fiber laser end-caps, flow-cell analysis in biotechnology, and non-destructive optical sensors deployed throughout Finland's pulp, paper, and maritime process automation sectors.

Transmittance ≥92% Parallelism <10 arcsec Laser Damage Threshold

Supplier Capability Matrix

Top 10 Quartz Glass Plate Factories Serving Helsinki

An objective capability assessment of Tier-1 primary melting producers and precision OEM converting exporters delivering to the port of Vuosaari and Helsinki-Vantaa Logistics Hub.

Manufacturer / Exporter	Origin / Operational Hub	Core Product Focus	SiO2 Purity / Tolerance	Helsinki Logistics Routing	Compliance & QA Profile
VEZLO Quartz Products	Donghai, CN (Direct Export)	Custom CNC Quartz Plates, Wafers, Discs	≥99.99% (≤20 ppm metals) / ±0.01 mm	Direct Air (HEL Airport 4-6 days) / Sea (Vuosaari)	ISO9001, RoHS, REACH, Onsite Verified
Heraeus Conamic	Hanau, Germany	Synthetic Fused Silica, Semiconductor Ingot	≥99.9999% / Optical Grade λ/10	Road freight via Baltic Highway / Ferry to Helsinki	Full Semiconductor Fab Certifications
Tosoh Quartz	Tokyo, JP / Europe Hub	Semiconductor Quartzware & Substrates	≥99.995% / ±0.05 mm	Air consolidation via Frankfurt to HEL	Global Tier-1 Foundry Qualified
Momentive Technologies	Strongsville, USA / EU Base	Fused Quartz Boules, Furnace Windows	≥99.99% / Standard Engineering Tol.	European Central Warehouse to Helsinki	ISO14001, AS9100 Aerospace
Corning Advanced Optics	Corning, USA / EU Distribution	High-Purity HPFS® 7980 Fused Silica	High homogeneity optical grade	Direct transatlantic express to Finland	Mil-Spec, Space Optics Qualified
Shin-Etsu Quartz	Fukui, Japan / European Branch	Synthetic Silica Plates & Photomasks	Extreme UV Lithography purity	Direct air cargo Tokyo to HEL	Ultra-clean cleanroom Class 10 packaging
Edmund Optics Europe	York, UK / Mainz, Germany	Off-the-shelf Optical Windows & Flats	Standard JGS1 / JGS2 Fused Silica	DHL / UPS ground express to Southern Finland	Standard Commercial Optical QA
Technical Glass Products (TGP)	Painesville, USA	Laboratory Quartz Glassware & Sheets	≥99.9% / General mechanical	Consolidated sea freight to Helsinki	ISO9001 certified converting
UQG Optics	Cambridge, UK	Custom Optical Components & Sight Glasses	Commercial Fused Quartz / Silica	Air express UK to Finland (customs cleared)	Def Stan, ISO verified testing
Qsil SE (now part of Qsil Group)	Ilmenau, Germany	Hollowware & Heavy Section Quartz Plates	≥99.99% / High temperature	Overland trailer via Travemünde-Helsinki ferry	TÜV Nord certified management system

Note: Sourcing evaluation reflects manufacturing capability, raw quartz feedstock purity, delivery timelines into Helsinki (FI-00100 to FI-00990), and support for custom technical drawings. Data compiled via technical audits and industrial import registries.

Enterprise Heritage & Technical Capabilities

Engineering Capabilities from China's Quartz Capital

Rooted in Donghai County, Jiangsu Province, VEZLO Quartz unites direct raw material mineral processing with high-tolerance CNC cold fabrication to deliver measurable cost and performance gains to Finnish buyers.

Integrated 33,000 m² Campus

Operating across a dedicated 50-mu production hub with RMB 10 million in fixed assets, eliminating third-party markups and ensuring complete traceability from quartz sand to final polished plate.

Raw Mineral Purity (≤20 ppm)

Formulated using high-purity natural crystal and synthetic feedstock across 13 proprietary grades, yielding total conventional metallic contaminants below 20 ppm for high-temperature stability.

Provincial S&T Innovation Base

Engineers of the 320 mm high-purity quartz tube for LSI circuits under the Jiangsu Provincial Science & Technology Support Project, and developers of 520 mm large-diameter furnace components.

Nordic Logistics Rapid Response

Guaranteed technical drawing response within 2 hours. Verified 50% repeat procurement rate with custom wooden crate crating compliant with ISPM-15 for seamless Finnish customs clearance.

Material Science & Quality Engineering

Fused Silica vs. Fused Quartz: Selection Guide for Finnish Engineers

Selecting the correct optical transmission band and thermal grade prevents unexpected field failures in harsh Nordic operating environments.

Procurement officers in the Helsinki region frequently balance the optical purity demands of research centers against the budgetary realities of industrial manufacturing. Fused silica and natural fused quartz deliver distinctly different transmission curves and thermal deformation characteristics:

Material Category	Common Designation	Primary Spectral Band	OH- Content	Recommended Nordic Application
Synthetic Fused Silica	JGS1 / Suprasil Equivalent	Deep UV – Visible (185–2500 nm)	High (600–1200 ppm)	Excimer laser optics, semiconductor wafer carriers, UV spectroscopy at VTT/Aalto labs.
Optical Fused Quartz	JGS2 / Homosil Equivalent	Visible – Near IR (220–2800 nm)	Medium (<30 ppm)	Industrial observation ports, high-power halogen viewing windows, optical flat mirrors.
Infrared Fused Quartz	JGS3 / Infrasil Equivalent	Visible – Deep IR (260–3500 nm)	Ultra-Low (<5 ppm)	Thermal imaging viewports, infrared moisture analyzers in paper processing mills, pyrometers.
Opaque / Translucent Silica	Opaque Quartz Plate	Thermal Barrier / Diffuse Reflection	N/A	Heat shielding for metal smelting, furnace baffles, clean energy combustion chambers.

Procurement Knowledge Base

Frequently Asked Questions for Helsinki Buyers

Direct answers addressing customs procedures, transport thermal shock, optical tolerances, and rapid quoting protocols.

What are the standard freight routes and lead times for quartz plates shipped to Helsinki? +

For critical R&D or prototype batches required by Finnish engineering firms, high-priority air cargo routes ship directly from Shanghai Pudong (PVG) or Zhengzhou (CGO) to Helsinki-Vantaa Airport (HEL) via Finnair Cargo or DHL Express, typically arriving within 4 to 6 business days. For volume industrial sheet shipments, sea freight routes depart Lianyungang/Qingdao to the Port of Helsinki (Vuosaari Harbour), with door-to-door transit spanning 32 to 38 calendar days including Finnish customs (Tulli) clearance support.

How do quartz plates perform under extreme sub-arctic temperature differentials in Finland? +

Fused quartz glass features an extraordinarily low coefficient of thermal expansion of approximately 5.5 × 10−7 /°C across temperatures from −50°C to 1000°C. This enables optical viewports and combustion plates to endure drastic winter outdoor conditions (e.g., −30°C in Northern/Central Finland) on one face while being exposed to >800°C furnace gases on the reverse face without thermal fracture, stress cracks, or loss of mechanical hermeticity.

Are custom CNC machining, stepped edges, and micro-hole drilling available to CAD drawing? +

Yes. VEZLO utilizes dedicated 4-axis and 5-axis ultrasonic CNC diamond machining centers. We work directly from STEP, DXF, or DWG files to mill precision counterbores, stepped edge flanges for vacuum O-ring sealing, laser-cut notches for wafer alignment, and micro-drilled hole arrays down to 0.5 mm diameter with positional pitch tolerances within ±0.01 mm.

What packaging standards prevent quartz plate breakage during international export? +

Every quartz plate undergoes automated ultrasonic cleaning and vacuum skin-packaging with lint-free PE barrier film to prevent surface scuffing and moisture condensation. Plates are cushioned inside custom-cut high-density EPE pearl cotton within heavy multi-wall cartons, then loaded into heat-treated, fumigation-free plywood shipping cases conforming strictly to ISPM-15 standards for hassle-free European border entry.

How does VEZLO support REACH, RoHS, and European quality compliance? +

All quartz plates are manufactured from high-purity inorganic fused silica without toxic binders, plasticizers, or hazardous lead/cadmium elements, ensuring full compliance with EU RoHS Directive 2011/65/EU and EU REACH Regulation (EC) No 1907/2006. Full material safety data sheets (MSDS), certificates of conformity (CoC), and spectrophotometer transmission curve charts are provided alongside export documentation.

What is the typical minimum order quantity (MOQ) for custom prototypes? +

We support Finnish universities, research institutes, and high-tech hardware startups with prototype runs starting from just 1 to 5 pieces. Volume batch pricing automatically scales for OEM equipment manufacturers requiring scheduled monthly or quarterly drop-shipments to production facilities across Espoo, Vantaa, Tampere, or Oulu.

Accelerate Your Quartz Sourcing for the Finnish Market

Submit your technical 2D/3D drawings, target optical tolerances, and required quantities. Our senior optical materials engineers will review feasibility and provide a binding factory-direct quotation within 2 hours.

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