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Wall Thickness

Gold | Wall Thickness
In 3D Printing, wall thickness refers to the distance between one surface of your model and the opposite sheer surface. For most models in Gold, the minimum wall thickness you can use is 0.8mm. However, when making something small such as the band of a ring, the wall thickness should be at least 1 mm. The fragility of the gold might cause the ring to break when you wear it if the model is too thin.

High Definition

Gold | High Definition

Since the resolution of the wax printing process is so high, make sure that you create your model and export your file with enough definition so you don’t see the triangles.


Gold | Geometry

Be careful when having large areas of your model connected supported by thin rods. Compare it to a big head resting on a thin neck. Ask yourself if the rods are strong enough to ‘carry’ the weight of the larger area. Also, internal structures are possible to print, but removing support structures, cleaning them and casting them can be difficult or even impossible. If you have doubts about whether your model is feasible, please contact us.

Hollow Models

Gold | Hollow Models

This material allows you to print hollow models. However, keep in mind that you need to incorporate multiple holes or slots so that we can get rid of any unprinted wax resin. In addition, you will need to make sure that the casting plaster is sufficiently supported or your model will not be able to be cast properly. Make as many holes or slots as you possible can. We recommend making two or more holes or slots. Make sure the holes are spread out equally; for example on opposite ends of your design. The holes should have a diameter larger than 1.5 mm.

Feature Size

Gold | Feature Size

The smallest features in your design should be at least 0.35 mm in diameter and 0.4 mm in height and attached to a solid surface. Details this small are suitable for delicate projects such as micro pavé settings.

Because Gold is not a very strong material, longer features such as rods or prongs (in mesh-like structures) should be at least 0.8 mm in diameter. Otherwise, they might break during casting or even when you wear the piece.


Clearance | Gold
The distance or space between two or more parts in your model is called clearance. If there is too little clearance between the parts, they might become fused during the casting of your model. Your model is first printed in wax, placed in a container, and covered in a liquid plaster. Then the wax is burned out, creating a cavity in the now-hardened plaster, leaving a plaster mold ready for casting. If the gap between the different parts in your model is too small, the plaster may not fully flow in or may create overly-thin walls in the mold that break when liquid metal is poured in. Both of these will result in defects in your casted model. Therefore, we advise a minimum gap of 0.3mm. If it is impossible to increase the gap in your design, you can consider fusing the features if their separation is unnecessary.


Gold | Polishing

In order to polish, we have to be able to reach the surfaces. As a rule, we can't file, sand or polish cavities and small sharp edges will be rounded off. Also, as you can imagine, complex internal, mesh-like structures are also impossible to reach.

Finishing and Its Influence on the Level of Detail

Gold | Finishing and Its Influence on the Level of Detail

Once your model is cast it will go to finishing. The post-processing technique for high gloss gold is unique and will always have an effect on your model’s level of detail. High-gloss models will undergo a manual mechanical polish. The polishing technique is aggressive and will erode your model by about 0.1 to 0.15 mm. Sharp corners will be rounded. It’s good to take the amount of erosion from these finishes into account when you are designing your model.

Nested Objects, Hinged and Interlinking Parts

Gold | Nested Objects, Hinged and Interlinking Parts

Nested objects (objects floating within another object), hinged parts, and interlinking parts, such as chains, cannot be made with lost wax casting. The reason is that support structures have to be removed before being cast in Gold.

Engraved Text and Surface Details

Gold | Engraved Text and Surface Details

For embossing or engraving details such as text, we advise you to keep a maximum height/depth-to-width ratio of 1:1. Also, keep in mind the minimum wall thickness of 0.35 mm.

Design Specifications

Minimum Wall Thickness
0.8 mm
Minimum Details
0.35 mm
±5% (with a lower limit of ±0.35 mm)
Maximum Size
88 x 88 x 125 mm
0.3 mm
Enclosed Parts?
Interlocking Parts?