What is used to make a DVD?
A DVD is composed of several layers of plastic, totaling about 1.2 millimeters thick. Each layer is created by injection molding polycarbonate plastic. This process forms a disc that has microscopic bumps arranged as a single, continuous and extremely long spiral track of data.
Are CDs made of acrylic?
Physical characteristics. A standard CD is 120 mm (4.75 inch) in diameter and 1.2 mm (0.05 inch) thick. It is composed of a clear polycarbonate plastic substrate, a reflective metallic layer, and a clear protective coating of acrylic plastic.
Do DVDs play from outside in?
The games are written from the outside of the DVD-9 discs to the inside, meaning that most discs will actually have the majority of their data stored around the outer perimeter of the disc.
Which plastic is used in CD?
Plastic is used across almost every sector, including to produce packaging, in building and construction, in textiles, consumer products, transportation, electrical and electronics and industrial machinery.
What are the different types of DVD?
DVD media comes in several formats; including DVD+R (recordable DVD), DVD-R, DVD+RW (re-writeable DVD), DVD-RW, DVD-RAM (random access memory) and DVD-ROM (read only memory). What are the differences among the formats?