Fire Assay
Typically a sample size of 10 to 50 grams is used for rock pulps, soils or sediments (exploration samples). The sample is mixed with fire assay fluxes
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Cupellation is an oxidizing fusion of an alloy of lead, gold, and silver in an absorbent vessel known as a cupel.
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Fire Assay Flux packaged in sealed poly bags within UN Rated Supersacks. Other packaging options are available.
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Inquarts are used to add a small, known amount (weight) of silver to each assay. This gives the necessary amount of silver to promote parting, and also gives
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Aluminized Rayon Gloves provide excellent radiant heat protection. Carbon Kevlar Backed Gloves give you added protection from molten metal splash for the back of the hand.

"Suppliers of Fire Assay Flux & Litharge"

* Gold Free Litharge

* Gold and Silver Free Litharge

* Gold Free Fire Assay Flux

* Gold and Silver Free Fire Assay Flux

Fire Assay Flux is used in geochemical assay laboratories for detection of gold in ore samples. Legend, Inc is North America's premier manufacturer and supplier of quality, gold free flux and litharge. Our quality system guarantees the levels of gold in the fire assay flux are less than 1-1.5ppb in the litharge component of the flux, making it ideal for low level assay work.

Legend Inc exports the product to every gold producing country across the world.

Legend, Inc Custom Fire Assay Flux can be custom-made to specific formulations and a variety of packaging options are available.

UN Rated Pails
22 lb Pails (48 Pails per Pallet), 43 lb Pails (36 Pails per Pallet) and 62 lb Pails (33 Pails per Pallet)

Seal Poly Bags
25 lb Sealed Bags shipped in UN Rated Supersacks (48 Bags per Bulk Bag)

(Learn more about the packagin options here .................)

Litharge

GOLD & SILVER FREE Assay Litharge - Lead Oxide (PbO)
A Reddish / Orange Powder Assay Litharge that is C.P. grade (Chemically Pure). This material is used for fire assaying processes for the quantitative determination of precious metals in an ore. It is the purest form of litharge, and is milled to a fine and uniform particle size for enhanced reactivity and consistency of reaction. (see Specifications......)

GOLD FREE Assay Litharge - Lead Oxide (PbO)
A yellow / orange Granular Assay Litharge that is C.P. grade (Chemically Pure). This material is used for fire assaying processes for the quantitative determination of precious metals in an ore. It is the purest form of litharge, particularly low in silver, and is milled to a fine and uniform particle size for enhanced reactivity and consistency of reaction. (see Specifications......)

Gold Free Granular Assay Litharge - 24lb Bucket Gold Free Granular Assay Litharge - 55lb (25kg) Bag Gold & Silver Free - Red Flake Assay Litharge - 24lb Bucket
Gold & Silver Free - Red Flake Assay Litharge - 55lb Bag Gold & Silver Free - Powder Assay Litharge - 24lb Bucket Gold & Silver Free - Powder Assay Litharge - 55lb Bag
Cookson Litharge Powder - Gold & Silver - 24lb Bucket Low Gold Refining Litharge Powder - Contains Lumps - 24lb Bucket Asarco Brand Litharge 55 lbs

Flux

Legend Inc is a major supplier of Fire Assay Flux to the US market and exports its flux to every gold producing country across the world. Several pre mixed fluxes are available "In Stock".

Legend, Inc can Custom Blend Fire Assay Flux to your specific formulations using either "Gold Free" or "Gold and Silver Free" litharges. A variety of packaging options are available.

GOLD & SILVER FREE Custom Fire Assay Flux

GOLD FREE Fire Assay Flux

Premixed Flux

PREMIXED High Litharge Fire Assay Flux with Flour - Bucket: Net 24 lbs PREMIXED High Litharge Fire-Assay Flux No Flour - Bucket: Net 24 lbs PREMIXED Standard Oxide Fire-Assay Flux - No Flour - Net 24lbs Bucket

PREMIXED Legend Standard Premixed REFINING Flux - Contains No Litharge - Bucket: Net 24 lbs

 PREMIXED Chapman Recipe Gold Smelting / Refining Flux - 25lbs & 50 lbs Bucket Custom Fire Assay Fluxes

Cupel

Legend, Inc is the North American Distributor of "Mabor Cupels".
MABOR Cupels are made from a unique blend of Magnesium Oxide and special fluxing incredients providing:

* Robust Mechanical Strength * Consistently Low Losses
* Not Afffected by Atmospheric Changes * Reduced Tendency to Freeze
* No Splitting of Lead * Perfect Uniformity of Quality
* Beads Easily Removed * Rapid Absorption of Large Quantity of Litharge

We carry a large stock of Mabor Cupels along with variety of other brands and types. Including: Mabor Cupel, Mabor Cupel Bullion Blocks, Pure Bone Ash Cupels, Composite Bone Ash Cupel, Cupel Trays, Cupel Forks, Cupel tongs, Lead Button Loader and Droppers.
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Mabor Cupel
Full Cases 		Mabor Cupel
Repacks 		Bone Ash Cupel

Mabor Cupel
Bullion Block

Cupel Trays

 Cupel Forks
and Tongs		 Lead Button
Loaders / Dropper		 Cupel Mirrors

 

Litharge & Flux is now Classed as a Hazardous Commodity
HAZMAT - UN 2291 Class 6.1 PG III


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Textbook of Fire Assaying by Edward E.Bugbee
This book is accepted as the premier reference text on fire assaying.
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Bismuth Oxide - Fire Assay Grade More and more assay laboratories are using flux made with Bismuth Oxide rather than lead oxide (litharge). There are a variety of reasons to do this. Bismuth is more environmentally friendly, so disposal and recycling are easier. Bismuth is also has less exposure risk. We always recommend wearing proper respirator protection as bismuth flux contains silica, but blood-lead monitoring is not needed and the medical surveillance is less rigorous.
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To request a more information or for a quotation on a Custom Flux please contact Legend, Inc at:

Phone: (775) 786-3003
Fax: (775) 786-3616
info@Lmine.com

Flux Chemicals
We maintain a large stock of Flux Ingredients: Soda Ash, Borax, Silica, Flour, Potassium Carbonate, Manganese Dioxide, Fluorspar, Sodium Nitrate, Potassium Nitrate, Silica Flour,
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