| Here we will take a brief look at the most common | | | | on the shape of a mirror image in the mold. |
| terminology that is used in CD duplication. | | | | Media or blanks |
| BLER | | | | CD-R media are the disks that are used to record |
| Block Error Rate. This is the raw digital error rate | | | | digital information using a special recorder and |
| before any type of error correction. | | | | premastering software with a computer. These discs |
| CD | | | | are made of a polycarbonate substrate, a layer of |
| This the Compact Disc, a digital medium that's | | | | organic dye, a metalized reflective layer, and a |
| formed of a 12cm polycarbonate substrate, a | | | | coating of lacquer for protection. |
| reflective metalized layer, and a protective lacquer | | | | Organic dye |
| coating. | | | | The data layer of CD-R media is made from a dye |
| CD-R | | | | that is melted during the process of recording. Where |
| Compact Disc-Recordable. The term CD-R is used to | | | | the dye is melted, becomes opaque or refractive, |
| describe the technology of recordable CD along with | | | | scattering the reading laser so that it isn't reflected |
| the equipment, software, and media that are used to | | | | back into the reading sensors. |
| make the recordable disks. | | | | Reflective layer |
| Data layer | | | | This is the metal later that sits on top of the dye |
| With CD-R media, this is the organic dye that is | | | | that reflects the laser beam back to the reading |
| sandwiched between the polycarbonate substrate | | | | assembly. This is normally 24k gold in CD-R disks, |
| and the metalized reflective layer of the media. CD-R | | | | although it can be silver as well. |
| disks don't have any data on them at all until the are | | | | As you become more and more familar with CD |
| recorded. | | | | duplication the above abbreviations and meanings will |
| Now that we've covered those aspects of CD | | | | become second nature. And next time you're at the |
| Terminology, let's turn to some of the other factors | | | | pub quiz and the question comes up "what does |
| that need to be considered. | | | | BLER mean?" you'll know instantly! |
| Injection Molding | | | | Sometimes it's tough to sort out all the details related |
| This is a manufacturing method where the molten | | | | to this subject, but I'm positive you'll have no trouble |
| material is forced into a mold, normally under high | | | | making sense of the information presented above. |
| pressure, then cooled so that the material will take | | | | |