Engineered to drawing in China's Crystal Capital (Donghai) and directly exported to European testing institutes, metallurgical processing labs, and chemical plants in Croatia.
Formed for tubular analytical furnace operations. Heavy-duty integrated handles provide secure manual withdrawal under continuous 1100°C thermal conditions.
Designed for semiconductor wafer substrate lapping and chemical etching carriers. Outstanding edge stability and resistance against boiling concentrated reagents.
High deep-UV transmission for chromatography, pharmaceutical assays, and environmental monitoring. Fire-fused structure resisting harsh acid wash cycles.
90-degree square flat cut ends ensuring vacuum sealing tightness in CVD reactors, thin-film deposition lines, and inert gas atmospheric furnaces.
Engineered for high-pressure fluid instrumentation, sight-level gauges, and micro-sampling pipelines handling hot mineral acid streams.
Designed for analytical tube furnaces with zero porosity, resisting sample absorption and eliminating heavy metallic background leaching in trace analysis.
Double-side optical pitch polished for autoclaves, high-pressure sight windows, and spectroscopic chambers exposed to violent acid vapors.
Exceptional thermal expansion coefficient (5.5 × 10⁻⁷/°C) preventing thermal fracture during instant rapid heating and cold gas quench cycles.
Laboratory beakers fabricated from high-purity fused quartz represent an indispensable technological leap over conventional borosilicate 3.3 laboratory glass. In demanding wet digestion, trace metal quantification, and synthesis protocols, standard borosilicate glass experiences measurable ionic leaching—specifically shedding alkali oxides (Na₂O, K₂O) and boric oxide (B₂O₃) into acidic solutions. When analytical scientists in Croatia perform trace element analyses via Inductively Coupled Plasma Mass Spectrometry (ICP-MS) or Atomic Absorption Spectroscopy (AAS), this background noise distorts baseline limits of detection (LOD).
Donghai Kemzo Quartz Products Co., Ltd. addresses this baseline vulnerability by employing refined crystalline quartz from the geological reserves of Donghai, China. With a silica purity rating ≥ 99.99%, our laboratory beakers consist of a continuous three-dimensional tetrahedral network of silicon-oxygen (Si-O-Si) bonds. This structure remains completely impervious to all commercial inorganic and organic acids—including concentrated hydrochloric acid (HCl), nitric acid (HNO₃), sulfuric acid (H₂SO₄), aqua regia, perchloric acid (HClO₄), and piranha solution—across both ambient and boiling temperatures. Only hydrofluoric acid (HF) and concentrated phosphoric acid (H₃PO₄) at elevated temperatures exceeding 150°C react with the amorphous silica framework.
Technical Insight: Fused quartz displays a negligible thermal expansion coefficient of approximately 5.5 × 10⁻⁷ /°C between 20°C and 300°C—roughly 1/6th that of borosilicate glass. This allows laboratory operators to withdraw a beaker containing boiling sulfuric acid at 250°C and place it onto a chilled surface without catastrophic thermal shock or micro-fracturing.
Standard laboratory glassware softens and sags under prolonged heating beyond 500°C. In contrast, fused quartz beakers manufactured by Kemzo operate reliably in continuous service at temperatures up to 1100°C, sustaining short-duration thermal excursions to 1450°C. The strain point is maintained at 1120°C, with an annealing point of 1215°C and a softening threshold near 1683°C. For high-temperature ash testing, mineral fusion protocols, and metallurgical catalyst digestion, quartz beakers serve as pristine, inert mini-vessels that bridge the gap between fragile glass and costly platinum or refractory ceramic hardware.
Benchmark data comparing Kemzo transparent fused quartz against standard laboratory glass alternatives for industrial procurement validation.
| Physical / Chemical Property | Kemzo Fused Quartz Beaker | Standard Borosilicate Glass | Procurement Performance Advantage |
|---|---|---|---|
| SiO₂ Purity Content | ≥ 99.99% | ≈ 80 - 81% | Zero alkali metal shedding; eliminates sample contamination in trace analysis |
| Continuous Working Temp. | 1100 °C | ≈ 230 - 260 °C | Facilitates high-heat acid digestion, ash tests, and open-flame evaporations |
| Maximum Short-Term Temp. | 1450 °C | ≈ 500 °C | Prevents structural deformation and sag during aggressive furnace protocols |
| Thermal Expansion (20-300°C) | 5.5 × 10⁻⁷ /°C | 33 × 10⁻⁷ /°C | Outstanding thermal shock immunity; withstands direct quench from heat |
| UV-VIS Spectral Range | 190 nm – 2500 nm | ≈ 330 nm – 2000 nm | Deep ultraviolet transparency allows direct photochemical reactions & assays |
| Acid Resistance Grade | Class 1 / Superior Inertness | Class 1 (Slight surface ion loss) | Total resistance to boiling aqua regia, nitric acid, and perchloric digests |
Tailored quartzware configurations serving specific production clusters and research centers from Zagreb to Istria and Dalmatia.
Croatia boasts a renowned pharmaceutical manufacturing heritage centered around Zagreb and Savski Marof. Our acid-resistant fused quartz beakers are utilized extensively in active pharmaceutical ingredient (API) synthesis, residue testing, and ultra-trace metallic testing, ensuring compliance with strict European Pharmacopoeia (Ph. Eur.) heavy metal leaching thresholds.
Marine research institutes, aquaculture facilities, and port environmental control laboratories in Rijeka and Split require specialized digestions for coastal sediment core samples, bivalve tissue contamination analysis, and heavy hydrocarbon monitoring. Fused quartz withstands the corrosive action of hot hydrochlorinated digests without marine salt crystallization bonding.
Across Istria, Slavonia, and Dalmatia, laboratories testing wine, premium extra virgin olive oil, and agricultural exports conduct mineral content analyses (potassium, sodium, magnesium, copper) via wet acid incineration. Our clear beakers ensure precise visual control of color transitions during titration and digest clearing.
Operating plants in Sisak, Kutina, and Slavonski Brod rely on robust sample vessels to digest metal scrap, alloys, and fertilizer intermediates. Fused quartz remains immune to violent exothermic spikes during concentrated nitric and perchloric dissolutions, preventing container erosion.
Supporting advanced chemistry, nanotechnology, and materials science departments at the University of Zagreb, University of Rijeka, University of Split, and the Ruđer Bošković Institute (IRB). We supply tailored beaker dimensions, tall-form, and jacketed vessels directly to laboratory procurement divisions.
As a member of the European Union, Croatia is rapidly accelerating environmental testing programs in compliance with the EU Water Framework Directive and Soil Health Law. Municipal water treatment facilities, watershed monitoring units (Hrvatske vode), and independent testing houses face lower permissible thresholds for heavy metals, per- and polyfluoroalkyl substances (PFAS), and agrochemical residues. This shift renders standard borosilicate vessels obsolete for ultra-trace preparation due to background leaching, accelerating the transition toward Kemzo high-purity quartz beakers.
With strategic industrial investments expanding around Zagreb, Rijeka’s deep-water port, and Osijek’s emerging technology zone, local testing laboratories are transitioning from generic apparatus to customized, long-lifecycle components. Croatian quality control managers prioritize total cost of ownership (TCO). Fused quartz beakers outlast conventional glass vessels up to ten times under recurring acid-boiling cycles, significantly decreasing annual scrap rates and contamination incidents.
Croatian scientific supply chains have historically relied on multi-tiered domestic or regional middlemen, elevating prices and extending lead times. Today, institutional labs and chemical enterprises increasingly utilize direct export relationships with ISO 9001 certified Chinese manufacturers. Kemzo supports this direct model by offering rapid express dispatch (DHL, FedEx) and consolidated sea freight to Port of Rijeka, paired with complete documentation (Certificate of Analysis, RoHs, REACH conformity).
Founded in 2011 in Donghai, China's crystal capital, we combine upstream geological quartz control with precision fabrication and export experience across Europe.
Situated adjacent to Donghai's world-renowned natural crystal deposits, we inspect, sort, and process silica sand in-house to secure baseline chemical purity ≥ 99.99% without third-party variability.
Over 11 years of custom engineering. We produce low-form, tall-form, spouted, flange-rim, calibrated graduation, or ground-joint beakers precisely tailored to your bespoke analytical setup.
Honored as a Jiangsu High Technology Enterprise and backed by an audited ISO 9001 Quality Management System covering strict annealing, stress relief, and optical clarity inspection.
71%–80% export quota worldwide. Comprehensive handling of EUR payments, multiple Incoterms (FOB, CIF, CFR, DDU, Express), and responsive engineering support within one hour.
Addressing common queries regarding material selection, international shipping, customs, and beaker performance under harsh working conditions.
Collaborate directly with our engineering team in Donghai. Send us your laboratory beaker specifications, required tolerances, and annual volume to receive technical feasibility feedback and transparent factory pricing within 1 hour.