CDs and DVDs can be reproduced either by Replication (Manufactured) or Duplication (Short Runs). There are advantages and disadvantages to each method, and reasons to choose one over the other. Continue reading “Duplication versus Replication”
We take CDs and DVDs for granted these days, throwing them on the desk, stuffing them 3 at a time into paper envelopes. But if we truly want these repositories of precious music and data to last, we need to handle them carefully. Here are a few points you may or may not know.
- The data side (bottom) of the disc must remain free from scratches, fingerprints, dust, etc.
- Cleaning the disc can actually damage it.
- NEVER touch either surface.
- Handle by the edges (or center hole).
- NEVER set a disc down on a hard surface.
- Return disc to its jewelcase to when done.
- NEVER write on the data side of the disc. If you must write on a disc, write ONLY on the label side (top) and ONLY with an approved marking device such as felt-tip, non-toxic permanent ink — NEVER USE A BALLPOINT PEN!
- Don’t let the bottom of the disc touch anything other than the player or the case it came in. I’m amazed at the scratched-up, greasy-fingerprinted premasters that I’ve seen.
- Use quality media. Taiyo Yuden are considered the best in the industry.
- NEVER leave an unprotected disc in direct sunlight – it will deteriorate the data. DO NOT expose to excessively hot and/or humid environments
- Never clean in a rotary fashion. If it becomes necessary to clean the disc, use a soft, dry cloth, rubbing gently, always from the middle towards the outside. This will minimize errors if you accidentally scratch the surface (the data starts from the center in). We recommend a micro-fine cloth available from most optometrists for eye glasses.
- Even slight bending of a disc can cause stress fractures. The aluminum then becomes deformed, causing some ridges to be blocked. As a consequence, error correction always has to be applied in that area, affecting the final sound.