An A3 laminator allows you to laminate documents as well as larger papers such as brochures and posters. With an A3 laminator, you can insert documents with a maximum size of A3. Laminate your documents and protect them from dirt, dust, and stains. You can also give your documents a professional appearance. Laminating sheets come in different thicknesses. Thicker sheets provide better protection, but thinner sheets are more flexible. It differs per machine which thickness is suitable for your laminator.