LPKF ProtoLasers are designed for PCB prototyping in the lab. The environmentally friendly laser replaces chemical etching and offers excellent precision. The elegantly curved, space-saving vertical sliding front door allows the user to stand or sit while inspecting the prototyping process through the window (the S4 has orange glass to filter the laser light). Opening the door with a handle bar is time saving and very much wanted by the users. In keeping with CD specifications, the viewing area is framed in black, the work/grip areas are blue, the entire housing is white. Minimal, accurate splitlines equal the inner precision. The ProtoLaser use unmixed materials for easy recycling.