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Since 1972 REGAL CASTINGS has offered continuous services to manufacturing jewellers in New Zealand and are the longest serving contract casters in the country. We ensure the best service possible with a consistent high standard of quality.


Casting alloys

Our in-house metallurgists are constantly working on perfecting our alloys to assist in all aspects of jewellery manufacture. Our specialised range of alloys has been developed over many years of working closely with our customers.

Castings Are Available In The Following Alloys:

Silicon Bronze14ct Red
Manganese Bronze14ct White
Sterling Silver18ct Yellow
Fine Silver18ct Red
9ct Yellow18ct White Medium
9ct Red18ct White Soft
9ct White S22ct Yellow
9ct White PD24ct Yellow-Fine Gold
10ct YellowPD40 & PD970 Palladium Alloys
14ct YellowPlatinum 950

We will cast in other alloys on request.

Cast finishing

All castings are bead blasted to ensure you receive the highest quality finish. We also offer at no charge an extra chemical stripping service.

Moulds

We have developed our own specialized mould cutting techniques and offer an urgent service when required at no extra cost. We have several moulding materials available to allow for the most suitable option and the best result from your patterns.

Alloy Density

Use this density table to help you calculate the weight of your castings from the weight of a wax, or to estimate the weight of a finished piece from the weight in a different alloy.

To convert from one alloy to another divide weight by the known alloy density and then multiply by wanted alloy density.

e.g: A ring weighing 3.0 grams is made of Sterling, and you want to know the weight of the same ring cast in 18ct Yellow.

3.0 ÷ 10.4 x 15.5

= 4.5 grams in 18ct Yellow

Alloy Density Table

Alloy NameDensity (grams per cm³)
Wax0.95
Bronze9.0
Lead11.4
Sterling Silver10.4
Fine Silver10.6
9ct Yellow11.2
9ct White M (medium)12.6
9ct White S (soft)12.6
9ct White X pal/plat12.9
9ct Red11.2
9ct Pink11.2
10ct Yellow11.6
14ct Yellow13.1
14ct White12.7
14ct Red13.1
18ct Yellow15.5
18ct Red15.5
18ct White (soft)16.4
18ct White (medium)16.4
22ct Yellow17.7
24ct Fine Gold19.3
P40 Palladium Alloy11.1
Platinum21.4
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