There are many types of glass mirrors, each representing a different manufacturing process and reflection type. However, the most common conventional mirror is a silver glass mirror. This ordinary mirror is sometimes referred to a as 2nd surface mirror because the glass is coated on its back surface with silver, which produces images by reflection. This rear side is also protected by a backing paint to prevent scratching and oxidizing of the fragile reflective surface. A 2nd surface mirror is produced by coating a silver, copper film and two or more layers of waterproof paint on the back surface of float glass. A silver glass mirror provides clear images, is durable (resists moisture), and is widely used for furniture, bathroom and other decorative and industrial purposes.