Ozalid is special type of printer used to make copies of plans, drawings, charts, and other documents. It works by using a special type of paper that is coated in a special type of ink. The paper is placed ontop of a heated plate. The plate is heated up which causes the special ink to turn into a gas which is then used to form copies on the special paper. Ozalid printers are used by architects, engineers and other people who need to make copies of documents quickly and accurately.