: an isomer that is a stereoisomer of a compound having two or more chiral centers and that is not a mirror image of another stereoisomer of the same compound â
A compact disc is a deceptively simple looking device considering the technology required to make it. 1  CDs consist of three layers of materials: 2  A base layer made of a polycarbonate plastic. 3  A thin layer of aluminum coating over the polycarbonate plastic. 4  A clear protective acrylic coating over the aluminum layer.
Celluloid is one of the first synthetic plastics ever created. It is a plastic created from wood products that includes cellulose nitrate and camphor. First created in 1863, it was a popular material to make items as diverse as jewelry and dolls from the 1870s through the 1930s.hen celluloid was invented and first came to prominence in the 1870s, dolls were nearly all breakable and fragile--bisque and china dolls were easily shattered and papier mache and wax easily ruined.