Silver and Gold Casting

A Solid Silver crocodile made in Zimbabwe by Patrick Mavros.
Maria de Toni Gold Expressions 2008 courtesy of the World Gold Council

Downloads

FileGold Star XL
(354k)
FileGold Star XXX
(319k)

Gold Star Powders has travelled the world to source the highest quality, pure raw materials and additions, to ensure premier performing consistent products are produced. Both Gold Star XL and XXX benefit from the high quality cristobalite that is tailored to our exact specification and manufactured at our sister company's calcining and grading division in Derbyshire, England. Gold Star powders recommends two investments for the casting of all Silver and Gold alloys both yellow and white up to 18ct, with the exception of 18ct Palladium White Gold (see Omega+ for 18ct Palladium White Gold casting).

Each of these competitively priced products produces excellent surface finish, a strong mould, and "cleans off" the casting easily. They are both suited to centrifugal and vacuum assisted casting methods, and, where vacuum flasks are used, a fast burnout cycle can be used.

Gold Star XL

Gold Star XL has been our greatest volume investment powder over the last decade, with a proven track record of success. XL will meet the demands of casting Silver and Yellow Gold up to 18ct.

Gold Star XXX

We are always seeking to improve upon our products; we were continually being asked for a cost effective quality investment powder which will cast both Yellow and White Gold alloys up to 18ct (with the exception of 18ct Palladium White Gold). Our Research and Development Team, supported by our own Calcining and Milling Facility, introduced Gold Star XXX which filled the prescription perfectly.

WATER TO POWDER RATIO
MACHINE VACUUM MIXING38:100
HAND MIX THEN VACUUM40:100

Use de-ionised water
Weigh water and powder
Slurry temperature 21°C
Leave for 90 min to stand before burnout

MACHINE VACUUM MIXINGmin.
Weigh out water & powder0
Add powder to water
Mix under vacuum1
Stop mixer and scrape blades0.5
Mix under vacuum3.5
Pour flasks2
Vacuum flasks1
Total time taken 8
HAND MIX THEN VACUUMmin.
Weigh out water & powder0
Add powder to water
Mix by hand1
Mix with machine3
Vacuum mixer bowl1
Pour flasks1
Vacuum flasks2
Total time taken 8
Silver & Gold Casting Graph

Do not remove flasks from furnace to cast until they have been held at casting temperature for a minimum of 1 hour. If held for less than 1 hour, the core of the flasks will be at a much higher temperature than the digital temperature display states, and may result in metal mould reaction.