: 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.
Standard Singled CD Jewel Case is the most common CD packaging. The dimensions are 125 x 145 x10 mm. The standard color is black, but clear/white is also available. The front sleeve of the standard CD jewel case can hold a booklet up to 32 pages. The back of the jewel case can hold a single printed card with two spines.