10-14-2004, 12:48 AM
The most important factor is the quality of the disc itself. The reason why some DVDs deteriorate over times is because the aluminum layer where digital information is stored gets oxidized by contact with oxygen. This happens for several reasons.
The first is the poor manufacturing of the DVD. Aluminum layer is sealed by plastic layer on top of it. If this seal is not air tight, it allows air to go thru.
The second reason is the scratches. If any scratches are deep enough, air can go through.
The third reason is the twisting of the discs. Many people tend to twist and bend DVD excessively in trying to take the DVDs out of tight case. Sometimes this causes glue between aluminum and plastic to fall apart, allowing air to go thru.
As long as both manufacturing and handling are done right, DVDs should last over 100 years.
The first is the poor manufacturing of the DVD. Aluminum layer is sealed by plastic layer on top of it. If this seal is not air tight, it allows air to go thru.
The second reason is the scratches. If any scratches are deep enough, air can go through.
The third reason is the twisting of the discs. Many people tend to twist and bend DVD excessively in trying to take the DVDs out of tight case. Sometimes this causes glue between aluminum and plastic to fall apart, allowing air to go thru.
As long as both manufacturing and handling are done right, DVDs should last over 100 years.