22.651 = REPLENISHER for OLD GOLD #99  (2ozt pack)
22.651 = REPLENISHER for OLD GOLD #99  (2ozt pack)

22.651 = REPLENISHER for OLD GOLD #99 (2ozt pack)

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Article number: 22.651
Availability: In stock

Use when casting scrap gold to give it a new luster.  No flux is needed.  It helps eliminates pink color, porosity, and pits.  

Each package contains enough to cast approximately 800dwt (40oz) of scrap gold.

Purpose

 
  • #99 Alloy Replenisher is designed to de-oxidize used gold for casting.
  • Can be used for yellow and white gold.
     

Mixing

 
  • 10K scrap - Add 5 dwt #99, and 3.57 dwt of fine gold for each 100 dwt of 10K scrap being melted.
  • 14K scrap - Add 4 dwt #99, and 5.60 dwt of fine gold for each 100 dwt of 14K scrap being melted.
  • 18K scrap - Add 2 dwt #99, and 6.00 dwt of fine gold for each 100 dwt of 18K scrap being melted.
  • For white gold, the above ratios can be used, but use will be limited to 1 or 2 times due to the yellowing of the white color.
  • If #99 is to be used with scrap and fresh mixes in continuous reuse, use ½ of the amounts listed above. This will prevent excessive buildup of deoxidizers in the metal.
     

Melting

 
  • Place #99 in bottom of crucible when melting, with scrap on top.
  • When the mixture becomes fluid, stir with a carbon or quartz rod to clean surface of any oxides produced.
  • Fluxing may be necessary, depending on condition of old gold. Boric Acid is the recommended flux.
  • #99 will work best when old metal is clean from heavy surface oxides and investment powder.
  • If metal is contaminated with cuprous oxide (the red copper oxide), only limited positive results can be expected.
     

Notes

 
  • Use carbon rods only with gas fired furnace or torch melt.
  • Quartz rods should be used for all electric induction melting.

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