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Specifications Fire assay fluxes according to customers' recipe, or our own specification. Gold free and silver free type are available The famous fire assay has been around for more than 500 years, but it still is the best method for determining the quantity of gold, platinium and other precious metals, thus widely used by gochemical assay laboratories. The fire assay process works by fusing or dissolving the rock sample in a crucible using a lead glass flux. Fluxes of various types are used on various types of ores. Most flux mixes may contain the following: Litharge, Sodium bicarbonate, Silica, Borax, Flour, Florite, Etc. Gemhold does custom manufacturing of lead monoxide(litharge) with qualified manufacturer in china, producing top grades of litharge from 99.5% - 99.9%min, which are widely used in fire assay, optical glass, piezo ceramic, and other industries. For fire assay industry, gemhold can produce assay grade litharge with very low gold and silver content, say, gold less than 1.5ppb, and silver less than 0.15ppm. Gemhold can produce assay fluxes according to customers' recipe, or from our own standard. Our ability to product high quality litharge enable us to produce idea fluxes needed in the low level assay works. Our quality control system and semi-automatic manufacturing processes make our fluxes fully reliable. We can assay each batch of our flux if customers require that, and coa be be provided before despatching
| HS Code | 3824.99 |
| Brand | EximNext |
| Material | Multi-component mineral flux (lead oxide, soda ash, borax, silica blend) |
| Grade/Type | Gold-Free and Silver-Free grades available per customer recipe or standard specification |
| Purity/Composition | Custom formulation; typically contains borax, soda ash, silica sand, fluorspar, and litharge in balanced proportions |
| Size/Dimensions | Fine powder, typically -100 to +200 mesh; particle size optimized for homogeneous melting in crucible assay |
| Standard | Fire assay standard; recipe tailored to customer ore type or standard metallurgical specifications |
| Application | Fire assaying for gold (Au) and silver (Ag) determination in ores, concentrates, and metallurgical products |
| Packaging | 25kg woven polypropylene bags, 50kg sacks, or 1MT jumbo bags; sealed and moisture-resistant packaging standard |
| Origin | Varies by supplier (specify at time of inquiry) |
Fire assay flux is a specialized mineral powder preparation essential for fire assaying in mining, metallurgy and precious metal refineries. Used to determine gold, silver and PGM content in ores and concentrates, this flux is formulated as per customer recipe or standard specifications. Gold-free and silver-free types available for specific assay requirements. Critical consumable for import-export trade in assay and refining operations. Packaged in standard or custom configurations for laboratory and industrial use.
| Business Type | Supplier |
| Year Established | Recently Joined |
| Employees | Contact Supplier |
| Annual Revenue | Contact Supplier |
| Main Products | View Products Tab |
| Major Markets | Global |
| Response Time | <4h |
| Response Rate | New Supplier |
Fire Assay Flux is available for wholesale import from Gemhold (sjz) Trading Co. Ltd., a verified Supplier based in China. The current FOB price is 24. Minimum order quantity starts at 1 Bags. HS Code: 3824.99 — used for customs classification and import duty calculation. Key product specifications include 3824.99, EximNext, Multi-component mineral flux (lead oxide, soda ash, borax, silica blend).
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When sourcing Fire Assay Flux for your business, securing the right balance of quality and cost is essential. Gemhold (sjz) Trading Co. Ltd., a verified supplier based in China, offers this product with key specifications including Gold-Free and Silver-Free grades available per customer recipe or standard specification, Custom formulation; typically contains borax, soda ash, silica sand, fluorspar, and litharge in balanced proportions, and Fine powder, typically -100 to +200 mesh; particle size optimized for homogeneous melting in crucible assay. By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $24/Bags and manage bulk orders with a minimum order quantity (MOQ) of 1 Bags. This product is actively traded under HS Code 3824.99, making it a staple in the Mineral Powder sector with strong demand from importing countries worldwide.
Importing Fire Assay Flux requires careful attention to shipping logistics, customs compliance, and secure payment terms. Gemhold (sjz) Trading Co. Ltd. offers flexible shipping options such as Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. To ensure a smooth transaction, buyers should verify import duties for HS Code 3824.99 in their destination country. Common payment methods for international B2B transactions include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P). All transactions and RFQs are facilitated through EximNext, a leading import export marketplace designed to make cross-border trade secure and efficient.
Finding trustworthy partners is the foundation of successful importing. The supplier of this Fire Assay Flux has been verified on our platform. Whether you are a distributor, wholesaler, or procurement manager, you can request a free quotation, ask for product samples, and finalize your bulk purchase with confidence. EximNext hosts thousands of verified manufacturers and exporters across 200+ countries. Explore similar products in the Mineral Powder category and connect with top-tier exporters on our comprehensive online B2B marketplace. Start your sourcing journey today.
Importing Fire Assay Flux requires careful attention to shipping logistics, customs compliance, and secure payment terms. Common shipping options include Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Buyers should verify import duties for HS Code 3824.99 in their destination country. Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P).
The current listed wholesale price for Fire Assay Flux from Gemhold (sjz) Trading Co. Ltd. is $24/Bags on FOB terms from China. Prices may vary depending on order volume, packaging, and destination. For the most accurate bulk quote, send a direct RFQ to Gemhold (sjz) Trading Co. Ltd. through EximNext.
The supplier, Gemhold (sjz) Trading Co. Ltd., has set a Minimum Order Quantity (MOQ) of 1 Bags for Fire Assay Flux. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
For international shipping and customs clearance, Fire Assay Flux is classified under HS Code 3824.99. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.
To import Fire Assay Flux from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Gemhold (sjz) Trading Co. Ltd.. Ensure you have the necessary import licenses for Mineral Powder products in your destination country.
Yes, Gemhold (sjz) Trading Co. Ltd. is a verified supplier on EximNext. You can view their complete company profile, business registration details, certifications, and export history before placing a bulk order.
The key specifications for Fire Assay Flux supplied by Gemhold (sjz) Trading Co. Ltd. include Gold-Free and Silver-Free grades available per customer recipe or standard specification, Custom formulation; typically contains borax, soda ash, silica sand, fluorspar, and litharge in balanced proportions, and Fine powder, typically -100 to +200 mesh; particle size optimized for homogeneous melting in crucible assay. For a complete technical data sheet or Certificate of Analysis (COA), send an inquiry directly to the supplier through EximNext.
Gemhold (sjz) Trading Co. Ltd. offers Fire Assay Flux with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Fire Assay Flux is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Gemhold (sjz) Trading Co. Ltd. through our platform.
Gemhold (sjz) Trading Co. Ltd. maintains international quality certifications. These ensure that the Fire Assay Flux meets international quality, safety, and regulatory standards required for cross-border trade.
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Gemhold (sjz) Trading Co. Ltd. will respond with a detailed wholesale quote including FOB pricing, lead time, and payment options.
Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), Documents against Payment (D/P), and Escrow services. Confirm accepted terms directly with Gemhold (sjz) Trading Co. Ltd..
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