| Compact disc (CD) copiers or CD duplicators copy the | | | | reversible process and these CDs can be used for |
| contents of one CD onto another CD (or many CDs). | | | | around a thousand rewrites. |
| CD copiers may be manual, integrated, or networked. | | | | Bulk copying of CDs is required in a lot of cases, such |
| With manual CD copiers, the operator is required to | | | | as for handing out CDs to music producers, passing |
| physically open the copier and reload the CDs. | | | | out hundreds of CDs at local concerts, or providing |
| However, they are slow and can copy only one to | | | | beta versions of a company's proprietary software. |
| nine CDs at a time. In contrast, the higher end versions | | | | The bulk CD copying process is also very cost |
| of CD copiers allow easy copying of CDs in bulk so | | | | efficient. With a tiered price structure, the more the |
| that one can copy up to 1100 CDs in one go in a small | | | | number of units ordered, the more is the saving per |
| span of time, without intervention. | | | | individual disk. |
| CD copiers may be CD-writable (CD-R) or | | | | Nowadays, with CDs changing in size, a lot of people |
| CD-rewritable (CD-RW). In CD-Rs, a laser recorder | | | | present their business cards on CDs which not only |
| copies data on a blank CD by selectively burning an | | | | contains the usual information about them and their |
| organic dye on the CD surface. This process is also | | | | company, but also provide a detailed list of the |
| known as burning and it is a permanent and irreversible | | | | products or services the company offers, along with a |
| process. CDs burnt by a CD-R can be used only once. | | | | whole host of other information. With such use of CDs, |
| But with CD-RW's, a laser recorder melts an alloy on | | | | bulk copying of CDs for the purpose of using them as |
| the surface of the CD in selective degrees. This is a | | | | business cards becomes absolutely necessary. |
