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Frequently Asked Questions - Astro-Vest^TM investment

Can I use ASTRO-VEST investment to cast stones in place or for gold casting?

Although Astro-Vest investment will certainly create a mold strong enough for stone or gold casting, it will not protect the stones from heat damage. ASTRO-VEST investment is a much harder investment, especially when removing the investment from gold castings. Generally, a phosphate material is not recommended for gold or silver castings because the softer metals become distorted or damaged during the process of cleaning the investment from the casting.

Is 1400^oF (760^oC) the maximum temperature for ASTRO-VEST investment burnout? If not, what is?

Phosphate materials can withstand temperatures of 1800^oF (982^oC), but these temperatures are not normally required for most casting applications.

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