With a proper post-cure, its final properties are achieved. During printing, the resin does not fully cure and is often soft and bendable. Post-curing is an important step in resin 3D-printing. Next to selecting high quality raw materials, the resin technology and additives developed for Liqcreate Clear Impact will prevent extra yellowing over time. Low quality raw materials and impurities in the resin can cause extra yellowing over time. The basics of good transparent and low/non-yellowing parts is the resin itself.
There are a few factors that are important when it comes to transparent parts: Depending on the quality of the resin, some are better for clear, non-yellowing parts. Next to epoxides, acrylates and urethanes are used in LCD, DLP, desktop laser based and MSLA 3D-printers. For instance epoxy resins, often used in large 355nm laser 3D-printers are notorious for their discoloration over time. Not every resin is suitable for long lasting transparent parts. There are a wide range of clear resins available for 3D-printing.
A post-processing step is necessary to create long-lasting transparent plastic parts.įigure 1: Parts 3D-printed with Liqcreate Clear Impact resin, on the left part fresh from the printer, middle after washing and drying, on the right after coating. After washing and drying, the transparency is lost and the part has a “frost” finish (middle bottle). Often, first-time-users are surprised by the transparency of parts fresh from the printer, as seen in the Coca-Cola bottle in the image below on the left side. One of the challenges in resin 3D-printing is to produce perfect transparent parts that will not yellow over time. Resin 3D-printing is one of the only 3D-printing technologies that can create high resolution transparent plastic parts. Learn how propmaker Campman Animatronics used Clear Impact to 3D-print a transparant transverse flute for the Dutch Queens 50th birthday. Applications like LED housings, prototyping lens parts and microfluidic devices are a few examples of application 3D-printed with clear resin. Clear and transparent 3D prints are ideal for creating clear prototype parts, showing internal cavities and details.
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