High-Purity Zinc Oxide (ZnO) for Glazes and Frits

Shlokar International is a reliable supplier of Zinc Oxide for ceramics, packaged securely to safeguard chemical integrity during transit and storage. Our ceramic-grade ZnO is highly regarded as a critical fluxing agent, optimizing melt flow, thermal expansion, and mechanical properties across various firing temperatures.

Utilizing high-quality zinc oxide reduces thermal expansion coefficients, minimizing the risk of crazing and shivering in finished ceramic items. For example, tile producers and frit manufacturers widely accept it for improving the refractive index, which directly enhances surface gloss and color depth. Additionally, we offer flexible packaging options and tailored bulk shipments to fit specific production schedules. Consequently, many manufacturers see minimized batch-to-batch variation and improved processing efficiency.

Product Details & Specifications

In addition, we provide comprehensive technical datasheets and full compliance documentation for bulk purchasers. Specifically, we monitor and provide parameters for total heavy metal content, iron impurities, and specific surface areas. Moreover, our technical sales team is available to clarify specifications by phone or email.

Product: Zinc Oxide (Ceramic Grade)

Chemical Formula: ZnO

Appearance: Fine white or yellowish-white powder

Grades Available: Calcined, White Seal, and Technical Grade

Packaging: 25 kg bags / Jumbo bags (Customized weights on request)

Suitable for: Ceramic tile glazes, frits, porcelain body compounds, glassmaking, and enamel formulations

Supply Ability: High-volume bulk quantities available — domestic and export

Applications of Zinc Oxide in Ceramics

For example, these common applications include:

• ✅ Core fluxing agent in the preparation of ceramic frits
• ✅ High-gloss tile glazes for wall and floor tiles
• ✅ Opaque and crystalline glaze development for studio pottery
• ✅ Thermal and chemical resistance optimization in glassware
• ✅ Fluxing component in sanitaryware and tableware formulations
• ✅ Color modifier to enhance the brilliance of specific ceramic pigments

Moreover, these applications benefit from the material’s ability to smoothly dissolve into silica networks at low firing temperatures. Additionally, many compounders prefer our zinc oxide for its predictable performance under diverse atmospheric firing conditions.

Key Benefits in Ceramic Applications

Moreover, sourcing premium zinc oxide provides multiple chemical and mechanical advantages that help manufacturers hit rigorous performance and durability standards. Also, many customers report enhanced surface hardness and scratch resistance when switching to our refined grade. As a result, manufacturing lines achieve higher sorting yields and lower defect rates. Therefore, optimizing your ZnO source directly contributes to both cost reductions and visual enhancements.

• ✔ Significantly increases the refractive index to deliver high surface gloss
• ✔ Lowers firing temperatures by acting as an effective melting flux
• ✔ Corrects thermal expansion to prevent glaze crazing defects
• ✔ Enhances mechanical elasticity and resistance to chemical leaching
• ✔ Improves the color development of chrome, iron, and cobalt pigments

Quality Control & Inspection Standards

Our quality assurance team closely monitors processing lines, removes unreacted metallic zinc, and conditions the powder to achieve a uniform particle size distribution. Furthermore, we follow strict incoming and outgoing inspection procedures, checking for heavy metal traces, moisture content, and loss on ignition (LOI) to comply with modern eco-friendly tile production norms. Additionally, we log inspection results and share Certificate of Analysis (COA) reports with buyers for every shipment. Consequently, buyers gain complete confidence in batch reliability before the material enters production lines.

For specialized industrial applications or international export contracts, we can arrange third-party laboratory verification (such as SGS) to confirm chemical compliance.

Packaging & Storage

We package our Zinc Oxide in multi-layer moisture-resistant bags to prevent atmospheric hydration and clumping. Additionally, we can customize pallet configurations, wrapping, and labeling to match automated raw material handling systems. Therefore, customers experience fewer processing hiccups and faster unpacking times. For this reason, our logistics partners prefer our standardized pallets. Typical packaging configurations include:

• • Standard weight: 25 kg laminated PP bags with inner LDPE liners
• • Bulk packaging: 1,000 kg or 1,200 kg UV-stabilized jumbo bags
• • Fully palletized, shrink-wrapped, and strapped for container shipping
• • Barcoded labeling complete with batch numbers, net weight, and manufacture dates

Why Choose Shlokar International?

Shlokar International combines extensive chemical sourcing experience, strict laboratory oversight, and streamlined international logistics to deliver uncompromised Zinc Oxide shipments. Moreover, our strategic positioning helps buyers source highly specific grades — including calcined and raw zinc oxide variations — tailored precisely to their firing curves. In addition, our logistics team handles clearing processes, port delivery documentation, and tracking to simplify global shipments. As a result, buyers receive end-to-end support from chemical analysis to warehouse delivery.

• ⚬ Verified raw material purity with transparent COA documentation
• ⚬ Competitive volume-based pricing and flexible Minimum Order Quantities (MOQ)
• ⚬ Swift turnaround times for domestic delivery and international ports
• ⚬ Reliable supply consistency tailored for continuous automated manufacturing

Frequently Asked Questions (FAQ)

Q: What is the purity level of your ceramic-grade Zinc Oxide?

A: Our standard ceramic-grade Zinc Oxide typically features a purity level of 99.5% or higher, with strictly limited iron (Fe) and heavy metal content to ensure clear, stain-free glaze properties. Additionally, we provide customized calcined variants on request. Also, complete lab specifications are included in our product brochures.

Q: How does Zinc Oxide prevent crazing in ceramic glazes?

A: Zinc oxide contributes to a low thermal expansion coefficient when fused into a glaze matrix. By replacing high-expansion oxides like sodium or potassium, it aligns the glaze’s expansion rate with the underlying body. Consequently, this prevents structural tension and eliminates post-firing crazing defects.

Q: Do you provide product samples and chemical COA documents?

A: Yes — we supply formal samples alongside independent laboratory analysis reports for qualified commercial buyers. For contract accounts, we also offer custom trial batches. Furthermore, our sample dispatch team ensures swift processing for validation testing.

Q: What is your typical delivery lead time and MOQ?

A: The Minimum Order Quantity (MOQ) typically aligns with full pallet volumes or complete container shipments depending on destination. Delivery timelines vary based on shipping parameters and port logistics. Contact our sales office for tailored logistics schedules.