Hank Chapman Recipe Flux – 1 lb | Gold & Silver Smelting, Refining, Recovery and Assaying
Improve your precious metal smelting and recovery process with Hank Chapman Recipe Flux, a specially formulated flux blend commonly used in gold and silver smelting, refining, jewelry work, and fire assaying applications.
Based on the well-known Hank Chapman flux recipe, this premixed product provides a convenient alternative to purchasing, measuring, and mixing individual flux ingredients.
Whether you're processing gold-bearing concentrates, working with precious metal scrap, or preparing samples for assay, this 1-pound package is a practical addition to your precious metal processing supplies.
Key Features
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Hank Chapman Recipe: Based on a recognized flux formulation used in precious metal smelting and recovery.
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Convenient Premixed Formula: Eliminates the need to measure and blend individual flux ingredients.
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Gold & Silver Processing: Suitable for compatible precious metal smelting and refining applications.
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Helps Promote Slag Formation: Flux ingredients can assist in combining certain unwanted materials into a separable slag.
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Useful for Gold Recovery: Commonly used in appropriate smelting processes involving gold-bearing concentrates and prepared materials.
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Jewelry & Precious Metal Work: Useful for certain refining and metalworking applications.
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Fire Assaying Applications: May be used in suitable assay procedures when the formulation matches the required process.
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Convenient 1 lb Package: Ideal for small-scale precious metal processing and workshop use.
Product Specifications
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Product Name: Hank Chapman Recipe Flux
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Product Type: Precious Metal Smelting Flux
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Form: Premixed Flux Blend
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Net Weight: 1 lb (16 oz / Approximately 454 grams)
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Applications: Gold Smelting, Silver Smelting, Precious Metal Recovery, Refining, and Assaying
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Package Quantity: 1
What Does Smelting Flux Do?
Flux is used during metal smelting to help manage certain impurities and nonmetallic materials present in the charge.
Depending on the material being processed and the flux formulation, it can help:
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Promote the formation of a separable slag
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Improve the fluidity of certain slag mixtures
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Assist in separating some unwanted materials from molten metal
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Support suitable precious metal recovery and refining processes
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Improve handling of certain mineral and metal-bearing charges during smelting
Important: Flux does not create gold or silver, and it does not guarantee complete precious metal recovery. Results depend on the composition of the material, furnace conditions, flux chemistry, and processing technique.
Popular Applications
Gold Prospecting & Recovery
Useful for experienced prospectors working with suitable gold-bearing concentrates and prepared materials. Flux may assist with slag formation during appropriate high-temperature recovery processes.
Silver Smelting & Refining
Can be used in compatible silver-processing applications where the selected flux formulation is appropriate for the material.
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This is 1 Lb of the famous Chapman Refining Flux. This is pre-mixed and ready for you to add your Black Sands, Ore, Gold, Silver, Computer Parts, Scrap Gold and smelt. This is also a great assay mix. Includes Borax, Soda Ash, Silica & Manganese. The bottom photo shows how a 1lb bag is packaged up in a 6" wide ziplock Bag
Note; We also sell Hank Chapmans Book on Smelting. "How to Smelt Gold & Silver" look for it in the DIY Books section
Melting and or Smelting with Chapman Flux basic instructions
Melting down Gold Jewelry;
Chapman Flux can be used to clean up your Jewelry and pull out embellishments. This will not refine it but will give you a better product than just melting. In this situation you should add ½ Part Flux to 1 part Jewelry by volume. In other more simple words if you have 1 shot glass full of jewelry then add ½ of a shot glass of flux. The melt everything down and keep melted for 10-20 min then pour everything into a mold at one time. Let cool the bust off the slag/glass and if you want to now make better looking bars then melt down the Gold with no flux and pour into bars. We offer over 200 different sizes and shapes of molds from 1 Gram to 1000 oz. Best results are with the use of High Density Graphite Molds. Used properly can last for hundreds of pours. We also sell many symbols, Numbers and letters of all sizes to stamp your bars. You should always stamp the weight and purity of your bar on it.
Smelting Gold from Black Sands;
Chapman Flux was designed to do just this very action. How much Flux to mix in with your black sands is as follows.
60% to 90% Gold needs 1 part flux to 1 part black sands & Gold. In other more simple words if you have 1 shot glass full of Black Sands then add 1 shot glass full of flux.
40% to 60% Gold needs 1-1/2 part flux to 1 part black sands & Gold. In other more simple words if you have 1 shot glass full of Black Sands then add 1-1/2 shot glasses full of flux.
1% to 39% Gold needs 2 part flux to 1 part black sands & Gold. In other more simple words if you have 1 shot glass full of Black Sands then add 2 shot glasses full of flux.
Once you have your Black sands, Gold and Flux mixed together put into a crucible and heat up to 2100 Degrees Fahrenheit and keep the Temp at 2100F for 1 hour. This is to allow all the microscopic gold & other Precious metals to collect together. Then pour all of your melted material out into a mold at one time. The Gold Bar or bead will drop to the bottom of the pour. Allow the pour to cool, you will hear cracking like glass shattering. Once cool you can then bust off the slag. If you small amounts of gold it will be a bead towards the bottom of the pour. If you have a larger amount then the Gold will be a bar at the bottom and the slag/Flux will be on top.
NOTE* It must pour like water!! If not you will need to add Chapman Flux Thinner (Flux thinner is Lime & Flourspar mixed 50/50 by weight) If your results have specs of gold in the slag it could be that 1. You didn’t keep the temp up to 2100F. 2. You took it out early and not the full 1 Hour. Or 3. Your material needs flux thinner because it poured out thicker than water.
Feel free to call us with any questions, there are no dumb questions. (Note, if you use more than listed it will not hurt anything at all except your pocket book)
