United
Precious Metal Refining, Inc.
ALLOY #99 REPLENISHER
Thank you for using UNITED'S alloys.
UNITED’S #99 ALLOY REPLENISHER is designed to de-oxidize used
gold, for casting.
You should obtain excellent results by following a few simple
instructions.
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 ˝ 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. We recommend Boric Acid. #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.
TECHNICAL ASSISTANCE
Always available…
Call 1-800-999-3463 / 1-800-999-FINE
E-mail / doc@unitedpmr.com
Web-Site / www.unitedpmr.com |