In general, minimum wall varies based on features
The more stress is put on your object, the thicker it has to be. While the minimum wall of Frosted Ultra Detail is 0.3mm and Frosted Detail is 0.5mm, this does not mean all parts of your structure will be strong enough at those points. For most designs, we recommend designing thicker walls as 0.3mm walls remain very, very brittle. Wires that support objects (like trees or lollipops), for instance, need to be thickened so they don’t snap. For more info on the ratios to use, read the next few tips!
Parts that jut out are more likely to break during shipping
To protect your pieces, sometimes it is helpful to build a cage around your object. This is especially true for thin wires that jut out (like the post on a model ship), the thinner the structure the more brittle the part. However, please note that a cage might cause some leftover support material on your part, meaning your part might be slightly yellow. If you plan on painting your model, we recommend cleaning off any excess wax before paining because the wax on the model prevents paint from sticking. Alternatively, you can thicken the wires that jut out. We recommend abou 0.6-0.8mm thick.
How to prevent walls from warping
Walls that are long and thin tend to break or warp during shipping due to the heat at transport. For models with walls that are 0.3-0.6mm thick, please try to keep these walls under 30x30mm in size. For walls of 0.6mm thickness, try to keep your walls under 50x50mm in size.
How to design thin, unsupported walls
This pictures shows models made 0.6mm thick sheets (top), and 0.3mm thick sheets (bottom). You can see both models started to warp once the walls get big enough. Based on these tests, we conclude that for models in the 0.3-0.6mm wall thickness range, to keep free standing walls under 30x30mm. For walls of 0.6mm thickness, try to keep your free standing walls under 50x50mm.
Be sure to design big enough escape holes for hollow parts
If your escape holes (i.e., holes in hollow parts) are not big enough, there may be support wax that still remains inside when we finish producing your product. This gives your piece a frosted look, which might look cool, but might also not meet your design intentions. The consistency of the wax is like that of melting candle wax, so think: if I were melting candle wax out of my print, would the wax flow through the escape holes? If not, then please widen your hole (or expect frostier prints). For most models we recommend having two holes of 2mm diameter each. Models with smaller holes may be rejected since it will be difficult getting the support material out (and the material will ooze out slowly overtime especially in hot weather). Last, having your holes at the opposite ends of the model (one on top, one on bottom) will help the wax escape faster and cleaner.
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