Spectra Advance Gold Investment 50lb

It is used to form wax molds for casting jewelry and fine art in gold. It is composed primarily of silica powder (quartz), cristobalite (a form of quartz), and a gypsum binder (calcium sulfate).
High quality for even the most complex pieces, it is an easy-to-use formula compatible with various mixing techniques. A “New Age” mold material for casting low-melting-point precious and non-precious alloys.

FEATURES
Ideal for melting white gold.
High compressive strength and low thermal expansion.
Resists rapid burn-off at high temperatures without cracking.
Provides a smooth, glossy surface with excellent detail.