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Polyjet – This process is similar to stereolithography in that parts are made with a photosensitive resin. The difference is in how the resin is applied and cured to build the part.

PolyJet technology uses a jetting head to accurately build each layer at 16 microns (0.0006 inches) thick, which is about 1/5 that of stereolithography layers. The jetting head slides back and forth along the X-axis, jetting tiny droplets of UV resin onto the build tray. Immediately after building each layer UV bulbs alongside the jetting head cure and harden each layer subsequently.

Two different materials are used for building: one material is used for the actual model, while a second, gel-like UV resin is used for support. Each material is simultaneously jetted and cured layer by layer. When the model is completed, support material is easily removed with pressurized water.

Because of the super thin layer thickness, the resulting parts are very accurate and have a very smooth surface finish.