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Hearsay question of the week: How long do CDs last?

Started by bull, January 19, 2007, 04:05:15 PM

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bull

My brother said he heard that photo CDs don't last very long. Anyone else hear this? By "very long" I think he means 10-20 years. Old black and white photos will last 100 years or more if stored halfway decent but from what I've heard we won't be able to do the same with 100-year-old CDs that store photos. Any truth to this?

Bandit72

if you keep them from getting all scratched up i dont' see why not...i have a cd that is going on 10 years old now and it still plays fine except the last 2 songs where there is a nice big scratch in it :P oh well
Daddy ran whiskey in a big black dodge
bought it at an auction at the masons lodge,
Johnson County Sherriff painted on the side,
just shot a coat of primer then he looked inside,
well him and my uncle tore that engine down,
I still remember that rumblin' sound.....

Charger_Fan

They'll be so antiquated in 10 to 20 years, there won't be anything around to read them anyway. :rotz:

The Aquamax...yes, this bike spent 2 nights underwater one weekend. (Not my doing), but it gained the name, and has since become pseudo-famous. :)

Todd Wilson

Various colors of the surface of a cdr  has a life span. Theres blue and green, gold and silver.   The blue and green ones dont last as long as the gold or silver.  If you are backing up digital camera photos you will want to plan to redo these back ups and a certain time. As someone else stated in 20 years the cd technology will be obsolete and this is true. You should plan to copy your cd's to the new media that will happen in the coming years to insure that your files are backed up and will continue to live on.   Its something to think about in this day and age as we all have seen the box of old black and white photos from our past family. We need to think to the future and keep photos now safe as we dont have negatives and prints laying around in a drawer somewhere anymore.  One computer crash and it all could be gone.



Todd


TruckDriver

I don't think that this applies to music CDs either. I got a few that are 20 years old now, and they play like new. It's all how well you take care of them.
PETE

My Dad taught me about TIME TRAVEL.
"If you don't straighten up, I'm going to knock you into the middle of next week!" :P

Todd Wilson

Quote from: Wi. Charger Guy on January 19, 2007, 10:02:43 PM
I don't think that this applies to music CDs either. I got a few that are 20 years old now, and they play like new. It's all how well you take care of them.


Your music cd's are silver and should last a very long time. You will find it tough to locate CDR's with silver surface. In fact I dont think I have ever seen any?!?!


Todd

Shakey

Quote from: Todd Wilson on January 19, 2007, 09:58:57 PM
Various colors of the surface of a cdr  has a life span. Theres blue and green, gold and silver.   The blue and green ones dont last as long as the gold or silver.  If you are backing up digital camera photos you will want to plan to redo these back ups and a certain time. As someone else stated in 20 years the cd technology will be obsolete and this is true. You should plan to copy your cd's to the new media that will happen in the coming years to insure that your files are backed up and will continue to live on.   Its something to think about in this day and age as we all have seen the box of old black and white photos from our past family. We need to think to the future and keep photos now safe as we dont have negatives and prints laying around in a drawer somewhere anymore.  One computer crash and it all could be gone.



Todd



I agree with what Todd has said.  My Wife and I have backed up all of our photos on CD's and have made two copies of each.  We have one set put aside at her folks place in case something should happen to the ones we have at home.  We have also put all of the photos on a memory stick but for now, only have one copy of those.  We plan on updating them as time and technologhy moves forward.

We look through these photos, some as recent as two years ago when our first child was born and shudder at the thought of losing them forever. 

TruckDriver

Quote from: Todd Wilson on January 19, 2007, 11:38:17 PM
Quote from: Wi. Charger Guy on January 19, 2007, 10:02:43 PM
I don't think that this applies to music CDs either. I got a few that are 20 years old now, and they play like new. It's all how well you take care of them.


Your music cd's are silver and should last a very long time. You will find it tough to locate CDR's with silver surface. In fact I dont think I have ever seen any?!?!


Todd


All the CD-Rs I ever used were silver. I been buying Maxell Music CD-Rs for the past 2 years. I also have used Memorex CD-Rs in the past. They were all silver too. I have to admit, I don't think I ever seen the colored ones your talking about ??? I never had any problems or seen any quality differences by using the music CDs to save pictures.
PETE

My Dad taught me about TIME TRAVEL.
"If you don't straighten up, I'm going to knock you into the middle of next week!" :P

Todd Wilson

A few clips taken for information.........

Unlike an ordinary CD, the CD-R has an organic dye recording layer between the polycarbonate substrate and the light reflective layer. In addition, the polycarbonate substrate is etched with a spiral pre-groove. This pre-groove is used for guiding the laser beam, time measurement and various controls during recording.
The laser beam, modulated by the recording signal, is focused on the groove. The beam heats and melts the recording layer of organic dye on the polycarbonate substrate, forming a series of pits. This pits are physically extremely stable, and are ideal for long-term data storage with the highest degree of reliability.

The color of the CD-R disc is related to the color of the specific dye that was used in the recording layer. This base dye color is modified when the reflective coating (gold or silver) is added. Some of the dye-reflective coating combinations appear green, some appear blue and others appear yellow/gold. Visual differences between various media types are irrelevant from the standpoint of their actual operation. At 780 nm, where CD-R recorders and CD-ROM readers function, the media are, for all intents and purposes, indistinguishable from an optical recording standpoint. They all "look" the same to the devices.

The gold-colored CD-R uses the PhthaloCyanine pigment and a gold reflection layer. As the pigment is transparent, the golden reflection layer shines through the bottom side giving the `golden' look. Compared to the other colored media, the reflection contrast of the golden medium is the highest and the durability of such CD-R's is said to be over 100 years. As the golden medium's reflective property is the highest, if your friends or customers have problems reading data from any other burnt media, try using the gold medium CD-R.

The green CD-R, the cheapest of the three, uses the Cyanine pigment. By itself, the pigment is blue in color, but together with the gold reflective layer, the bottom appears green. However, cyanine's ability to maintain reflectivity is poor giving it a life span of about 10 years. It also delivers the weakest reflection contrasts and thus can cause read errors when run on old CD-ROM drives.
Lately cyanine formula has been altered which results in a much higher life span (20 to 50 years). The gold reflection layer has also been replaced by a silver reflection layer this make the color of the bottom appear blue.

The blue media is made of Azo pigments. Like cyanine, it is blue in color but unlike the green CD-R it uses a silver reflection layer which gives the blue color. Manufacturers claim blue CD-R's are as durable as golden ones.

bull

Well there's some news I can use. :icon_smile_tongue: So what's the best way to store these longer-lasting CDs?

69bronzeT5

Well, I had this Ozzy Osbourne Randy Rhoads live cd and it lasted for 2yrs til my sister's dog got it :'( But, I just found this ACDC Back In Black Cd and it still is in good condition and it plays without skips. Apperentley, my dad bought it back in 1981 when it came out.
Feature Editor for Mopar Connection Magazine
http://moparconnectionmagazine.com/



1969 Charger: T5 Copper 383 Automatic
1970 Challenger R/T: FC7 Plum Crazy 440 Automatic
1970 GTO: Black 400 Ram Air III 4-Speed
1971 Charger Super Bee: GY3 Citron Yella 440 4-Speed
1972 Charger: FE5 Red 360 Automatic
1973 Charger Rallye: FY1 Top Banana 440 Automatic
1973 Plymouth Road Runner: FE5 Red 440 Automatic
1973 Plymouth Duster: FC7 Plum Crazy 318 Automatic

bull

So I shouldn't store CDs in your sister's dog's mouth? :icon_smile_cool:

69_500

Did I just read that right? Your saying your dad bought an AC/DC CD in 1981?


bull

Quote from: 69_500 on January 20, 2007, 06:27:57 PM
Did I just read that right? Your saying your dad bought an AC/DC CD in 1981?



;D I didn't catch that part. lol Good one. Bronze, are you fibbing again?

69_500

He must be the inventor of the CD then. No wonder it still works perfectly.

69bronzeT5

Quote from: Ranger Max on January 20, 2007, 08:43:51 PM
1980 Compact Disc standard proposed by Philips & Sony.

1981 Matsushita accepts Compact Disc Standard
Digital Audio Disc Committee also accepts Compact Disc Standard.
Sharp achieves production of semiconductor laser.
Philips & Sony collaboration ends.

1982 Sony & Philips both have product ready to go.
Compact Disc Technology is introduced to Europe and Japan in the fall.

1983 Compact Disc Technology is introduced in the United States in the spring
The Compact Disc Group formed to help market.
CD-ROM Protoypes shown to public
30,000 Players sold in the U.S.
800,000 CD's sold in the U.S.

1984 Second Generation & Car CD players introducted.
First Mass Replication Plant in the United States built.
Portable (i.e., Sony DiscMan) CD Players sold.


~You're right on 69 500....you should find a jepordy audition~


Crap...sorry, my bad. I wasnt lying, I just make a mistake. 1981 just came into my head when I was posting. Its deffintley from the early 90s cuz the new Back In Black remake cds are black where the one I have is pink and silver.
Feature Editor for Mopar Connection Magazine
http://moparconnectionmagazine.com/



1969 Charger: T5 Copper 383 Automatic
1970 Challenger R/T: FC7 Plum Crazy 440 Automatic
1970 GTO: Black 400 Ram Air III 4-Speed
1971 Charger Super Bee: GY3 Citron Yella 440 4-Speed
1972 Charger: FE5 Red 360 Automatic
1973 Charger Rallye: FY1 Top Banana 440 Automatic
1973 Plymouth Road Runner: FE5 Red 440 Automatic
1973 Plymouth Duster: FC7 Plum Crazy 318 Automatic