PolyJet is a 3D printing technology that uses a process similar to inkjet printing. It works by depositing layers of liquid photopolymer resin, which are then cured with ultraviolet light. This allows for the creation of highly detailed and complex shapes with smooth surfaces. One of the key advantages of PolyJet is its ability to produce multi-material parts. This means that different materials can be combined in a single print, allowing for varying properties like flexibility and rigidity within the same object. This versatility makes PolyJet popular in industries such as aerospace, automotive, and healthcare.