Multi-Colour Plaster Design Guide
Below are list of guidelines and tips you should note when designing parts in CAD for Plaster Multi-Colour 3D Prints.
2 Working Days
This may vary depending on size, quantity, quality of 3D data provided, and remaining available space in the machines on the day. We run on a first come first served basis and have a cut off point of 3pm to include any files into that days build.
Maximum Build Size
254 x 356 x 200mm
If your project exceeds this size, then you may wish to reduce the scale of the object, or separate it into parts so it can be reassembled afterwards.
White = £1/cm3
Colour = £1.20/cm3
The cost of Multi-Colour is based on the total volume of the object. i.e. for the amount of material used.
For an estimate on a single part you can use our Multi-Colour Estimator.
When using this you must be confident the file is perfect, this will avoid miscalculations on the total volume. For accurate quotes we recommend that you send us the file. We will often hollow the model with a recommended 3mm shell, as this will reduce the cost and of the model significantly while still keeping the model strong enough to withstand post processing and delivery.
The print accuracy of this material is limited. Multi-Colour is more suited to fine visual representations of forms and colour rather than precision parts. Models are built with a layer thickness of 0.1mm and each layer has a resolution of 600 x 540 dpi and can produce over 390,000 colours simultaneously.
Minimum wall thickness
This thickness will produce enough strength for most requirements. It is defined by its ability to withstand pressure from the blowgun when removing the excess powder There are many variants when it comes to providing a minimum thickness, as it can depend on the amount of structural support, shape, orientation, and weight load of the model.
Minimum Surface Details
This measurement is given for details that are extruded or embossed on a surface, meaning they are fully supported. Any less than this and these details may not appear clear and consistent on all axes.
The outer shell thickness is the main measurement that gives the model the necessary strength it need needs to be handled and to prevent the part from deforming . A thickness that is any less than this will cause the model to be extremely delicate and prone to damage.
Clearance between parts
This is determined by how close 2 objects or surfaces can be printed next to each other. If they are much closer than this then sufaces can begin to bind together, distort or it can become impossible to remove the excess powder. In some cases it may not be impossible to remove all the powder from areas of the model if they have deep crevices.
Clearance for Interlocking Parts
Although this method of printing makes interlocking parts possible, we would not recommend it. We harden the parts with a cyanoacrylate (superglue) and this can cause the parts to become stuck together. In most cases this material is too brittle to print intricate designs, such as chainmail.
Deep holes or recesses can often create problems for removing powder that has not been bound, for example, if you were printing a long thin tube, it can become very difficult to remove the powder from the centre of the hollow.
As this is a powder based technology, the powder will become trapped inside hollow parts if there is no hole for the powder to escape from. If the unbound plaster cannot be removed from your model, then you will be charged for a solid part. Therefore all hollow parts will require an aperture to allow the unbound plaster to be removed in order to provide the best price.
The texture of a finished plaster model is fairly granular, similar to a fine sand paper. All parts will have a grain of 0.1mm layers in the Z axes. This is often invisible to the eye and only becomes more visible with gradual drops in contour.
This material is not at all flexible. Multi-colour is a very hard, brittle material, and thin unsupported details are prone to break.
Despite being hardened in cyonoacrylate, these models are still very porous and should be kept away from liquids entirely.