1. STYRENE – This is a lightweight plastic material. It definitely needs sturdy backing when mounted into a clock otherwise it will sag or will not lay straight.
2. PAPER – This has about the thickness and stability of a piece of heavy-weight construction paper. It definitely needs sturdy backing when mounted into a clock otherwise it will sag or will not lay straight.
3. PARCHMENT PAPER – This is a waterproof and grease-resistant paper dial produced by treating ordinary paper with concentrated sulfuric acid. It has a thickness of cardstock and we highly recommend using a mounting board otherwise it will be too flimsy.
4. MASONITE – This is a material made from wood fibers compressed into sheets, and having many household and industrial uses. This does not need a mounting board. It is very sturdy. Although the customer may use one if he wants.
5. METAL – This is a sturdy dial less than 1/16” thick usually. It does not necessarily need a mounting board but most customers use them for added stability. These cannot be used with atomic movements.
6. CERAMIC – This is a purely ceramic dial that is usually about ¼” thick. It is very sturdy and a mounting board is not necessary but a customer may use one if they so choose.
7. CERAMIC OVER METAL – This is a ceramic dial with a metal plate in it to help make it sturdy since they are only 1/16” thick. Because it has a metal plate to strengthen it, a mounting board is not necessary but the customer may use one if they choose. These cannot be used with atomic movements.