22-651 = REPLENISHER for OLD GOLD #99 (2 ozt pack)

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.