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Select the proper Master Alloy or Karat Grain for the job. Some are designed for rolling and not casting. Some casting master alloys are designed for specific karats. See our Master Alloy "Usage" chart for selecting the correct alloy. |
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Pre-mix your master alloy with the gold first. Place alloy first (bottom) then fine gold (top) in a clean crucible. This will allow the fine gold to dissolve into the mix. The density of gold versus the alloy will do this naturally and prevent volatility. Add a small amount of Flux. Check melting temperature for excessive heat, or you will be destroying the alloys in the mix. Use a clean stirring rod to mix before pouring. Pour into water to make "Shot" or create small bars that will fit into your casting crucible. |
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Use recommended casting and flask temperatures when casting. It is our experience that the correct melting temperatures of the metal prior to "cast" should be approximately 150°F above its liquidus state. These temperatures are a guide to be used initially. The correct flask heat and melting temperatures should be determined by your experience with the alloys, pieces cast and equipment. |
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After casting, allow a minimum of 15 minutes for the flask to cool down. Thereafter quench the flask in cool water. Break the remaining investment with a tool or high pressured water. Under certain conditions, quenching can be immediate. Among those conditions is when you cast pink gold. |
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Ross Metals believes that the above data is accurate and reliable. However, they are the only recommendations given to you free of charge, and should be employed by you with discretion and risk. Ross Metals assumes no responsibility for difficulties or damages incurred by adhering to this information. |
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