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How to estimate the Weight of Platinum for Casting

 

Platinum Alloy Specific Gravity Wax to Metal Ratio
90 / 10 Iridium 21.5 Weight of wax X 21.5
95 / 5 Iridium 21.4 Weight of wax X 21.4
Platinum / Cobalt 20.8 Weight of wax X 20.8
Platinum / Ruthenium 20.65 Weight of wax X 20.65
Pt 950 / Heat Treatable 19.3 Weight of wax X 19.3

 

Knowing the weight of platinum is important for pricing finished product.

When working with a model material, the following formula should be used to find the weight of platinum required.

 

 

When using wax, multiply the weight of wax by the SG of the Pt to obtain the estimated weight. Be sure to allow for the casting button.

 

Source: Platinum Guild International USA

How to estimate the Weight of Platinum for Casting