The modern world depends on many machining methods. Few are as well-known or versatile as 3D printing, which is just as commonly found in households as in industrial centers. It can create small, large, simple, and complicated parts, as well as opaque, translucent, or transparent components.
The Challenge of Achieving Clarity
The difference between translucent and transparent is the degree of clarity. Translucent items will let some light through, though that light may become warped or bent (refracted) and appear distorted. Yet something transparent allows light to pass freely through without causing any distortion. As may be expected, printing a translucent part is easier than printing a transparent one.
The difficulty in achieving clarity is due to the fundamental fabricating process. 3D printing belongs to the family of “additive manufacturing,” meaning it creates by addition: stacking layer after layer of melted material until the desired workpiece is completed. Since a print may comprise multiple layers and small gaps or pockets throughout, light beams passing through and between them get scattered. The resultant photonic jumble detracts from the clarity of a build.
Printing Clear Parts Requires Some Tweaking
One way to ensure transparency, or at least translucency, is via material selection. If using a basic 3D printer, thermoplastics like PETG and PP offer great potential while satisfying other needs, including mechanical properties, cost, and post-processing considerations. If using a PolyJet printer, usually more common in industrial settings, resins are one’s best bet for transparency.
Exceptional clarity requires post-processing strategies, such as heat treatment. Yet numerous other print settings are influential, including thickness, layer height, extrusion rate, infill percentage, and temperature. There’s always a delicate balance, as factors like temperature can improve transparency at the risk of burning the material or creating interior bubbling.
Your best, as always, is to conduct a bit of research and consult a tutorial, such as the one offered by the digital marketplace Xometry.
