Gold

What is Gold

Gold is known to be one of the most malleable and ductile metals. It’s a precious metal often used for jewelry and has long indicated wealth. It has a high-quality finish with minimal processing or upkeep, making it suitable for day-to-day use.

Pure gold is quite soft and malleable. Therefore, it is often refortified with an alloy to give it added strength and other superior mechanical properties. These alloys are referred to as karats: 24 karats denotes pure gold; 18 karats is 75% gold/25% alloyed metal, and so on.

The trade-off of these alloys is strength for tarnish-resistance. High-karat Gold is softer and more resistant to tarnish. Low-karat Gold is stronger and less resistant to tarnish. We offer alloys that contain 75% gold (18K) and 58.5% gold (14K).

The table below offers the exact contents of each of these alloys:

Properties

Gold is non-toxic and unaffected by air and most reagents. It is also a good conductor of heat and electricity.

For more specifications, the table below shows the exact properties of Gold.

Printing Method

Gold models are 3D printed through casting. Casting is a common technique that uses molds to produce a small series of functional metal parts. It is particularly useful for fast production of high-quality prototypes or end-use products.

3D printing is useful in this technology to print the original wax model. This is often completed through stereolithography (SLA) technology with a high-detailed finish. The mold is then cast around the wax model. Once set, the wax model is melted and drained, leaving a void in the shape of the model in the mold. Then, the mold can be filled with Gold. This method is ideal for producing jewelry and other small-sized metal components.

Design Specifications

Thickness & Geometry
The maximum size of the model will depend on the print bed of the 3D printer. It is not advised to 3D print the model in parts to be assembled. The minimum size will depend on the casting. Please refer to the specific casting type for these specifications. Models that are too small will not be able to be filled.

Details
The minimum wall thickness for Gold is 0.8 mm to ensure it can hold its own weight. If a wall thickness of less than 0.8 mm is desired, you may need to choose a different material that can be used for thinner designs.

For small details, a minimum spacing of 0.3 mm is required to ensure the wax does not get trapped.