United
Precious Metal Refining, Inc.
Sterling Plus
Sterling Plus is a proprietary sterling silver designed to
achieve maximum tarnish resistance. Sterling Plus is slightly harder
than standard sterling silver. Sterling Plus contains 100 % precious
metal including Platinum.
Melting: Traditional methods of melting regular sterling silver
I.E. (as cool as possible) will cause a variety of problems.
Sterling Plus requires a higher melting & casting temperature than
normal or de-oxidized sterling due to the platinum addition.
MELTING
Temperature Range 1040° - 1100° C.
1910° - 2000° F.
REMELTING
We recommend a 50% fresh mix. Since no oxidation occurs with
Sterling Plus less fresh may be used.
FLUXING
Fluxing should not be necessary. Do not use Carbon Containing Fluxes
or Charcoal. Skim any surface oxides off the surface before
stirring.
QUENCH TIME
5 - 10 minutes.
HARDNESS
This silver as cast will be slightly harder than traditional
sterling silver.
INVESTMENT REMOVAL
Most standard investment removers will successfully remove the
investment powder. The best solutions are the sulfuric and
hydrofluoric based products. UNITED's Brite-Cast Investment Remover
also works well, although it is less aggressive and will take
longer.
FLASK TEMPERATURE
Use your regular flask temperatures. May require higher
temperatures.
FIRE SCALE
Fire scale is completely eliminated.
CYANIDE TREATMENT
Not recommended.
SOLDER TREATMENT
Soldering heat should always be as low as possible.
TECHNICAL ASSISTANCE
Always available…
Call 1-800-999-3463 / 1-800-999-FINE
E-mail / doc@unitedpmr.com
Web-Site / www.unitedpmr.com |