#1  
  01-25-2017, 09:44 AM
 
Member Removed / Locked / Why?
 

Stats: 37 posts since Nov 2016
Thanks: 0 times in 0 posts
I have read on the web many sites the information that there are fungi ( example Geotrichum Candidum) that eat and degrade polycarbonate, eat dye, eat glue, eat reflective layer of CD / DVD / MDisc this information is true or false? Have analysis of scientists how to avoid this problem of longterm storage? I always wash my hands before handling cd / dvd / mdisc but the fingerprints stay in the center and edge of the disc


Attached Images
File Type: jpg CD-fungi.jpg (32.3 KB, 301 views)
File Type: jpg dm-cdfungus.jpg (37.2 KB, 141 views)
  #2  
  01-25-2017, 10:44 AM
lordsmurf's Avatar
Site Staff – Forum Moderator
 
Arcade Wins: Asteroids Champion Minigolf Champion People on Fire Champion
Location: The Smurfs Village
Stats: 9,731 posts since May 2005
Status: Moderator
Thanks: 126 times in 112 posts
This really is not the correct site for these advanced topics. You came here, following me, but you need to curtail some of these advanced video things to digitalFAQ.com. Not TVPast.

Ether you're not reading it correctly, or you're reading regurgitated information from people that themselves don't understand any of this beyond the scary BS news from last decade.

"Eats polycarbonate", for example, is nonsense.

Remember, CD is not archival. Why? The dye is easily exposed, the foil is fully exposed. Oxygen ruins it over time, and it's easily subjected to contaminants. And yes, one of those contaminants can be organic. And yes, organisms that survive off other organic matter.

There's a lot of weird stuff on our planet. We constantly find things surviving in places never thought possible. But are they widespread? No. They're curiosities. In the past 20 years, I've read about less than a dozen cases of this nature. They are fascinating from a scientific perspective, but little else. All are about CD-R, no other optical format (not pressed, not DVD, not even CD-RW).

Washing your hands is funny, if you understand the science. It's not that type of bacteria. You're concerned about something that you'll likely never see first-hand. You have a better chance of winning a lottery, or being struck dead by lightning.

This was first reported more than 15 years ago. Their conclusion:
Quote:
Philips, the Dutch electronics company that invented the compact disc, said it believed the Belize case was probably a freak incident caused by extreme weather conditions.
A few more cases have surfaced since then. Many, many so-called "fungus" topics in user forums and blogs, however, are not due to contaminants. Many uneducated users, for example, confuse dye imperfections with fungus. I see a lot of those by simply searching for "disc fungus" in Google image search.

This topic was already answered 2 years ago: http://www.digitalfaq.com/forum/medi...s-damaged.html
I'm not re-hashing it again.
You got your answer then, and it's unchanged now.
__________________
The LS Collection:. My Cartoon and TV Show List | My Want List | My Future Projects
The following users thank lordsmurf for this useful post: opticalmediafan (01-25-2017)
  #3  
  01-25-2017, 10:49 AM
 
Member Removed / Locked / Why?
 

Stats: 37 posts since Nov 2016
Thanks: 0 times in 0 posts
Did you say that only the CD is attacked by fungi? DVD and MDisc are not affected by these parasites?

I read on some websites that said that Geotrichum fungus eats polycarbonate but I did not understand that claim from them

you see photos?

What are these extreme weather conditions? I store my cd / dvd / mdisc in cases inside in bags plastic in low humidity dry places with maximum temperature of 36șC but in months of rain I can not control the humidity and it gets high humidity anywhere, it is in those months of rain that the fungi arise
  #4  
  01-25-2017, 04:50 PM
cp32's Avatar
Gramma of CPS
 
Location: ohio, USA.
Stats: 4,271 posts since Jun 2005
Status: Verified Member
Thanks: 22 times in 21 posts
Send a message via Yahoo to cp32
Most germs are microscopic . Even bacterial de-containments are not full proof. I m a huge science geek. Infact I got A's in science , astronomy , and few other related classes. The killer fungi are unseen to the human eye. Those types of fungus are usually found in places like the Amazon, Rain Forest, obscure locations of foreign countries. You ll drive yourself crazy and become paranoid over this subject. I-. If you have those types of bacteria living in your area . I sure hell wouldn't stress over my dvd collection - I d move to another location.

I understand as LS has pointed out in the past. You are trying to learn . That's great.
But some of your posts are over kill. Once you get the answer thats it. There are no magical solutions to preserving data life. It will either last . Or it wont . That simple.Technology, like life , is an unpredictable . There will be no one right answer to anything. We all live in different climates . Which is also unpredictable these days due to Climate Change. For example-I live in Ohio in USA. 3 yrs ago during this time of the year we would normally have nearly a foot of snow. Sub freezing temperatures 3- below zero . Today it is 60 degree ! and raining like a spring day. When it rains here- our basement gets a lot of water - and mold happens. I have allergies - BAD ALLERGIES! I run a dehumidifier. Take medication and try not to stress over it .
But Tomorrow I may get 8 inches of snow.
Who knows... You are young. Go out and enjoy your life. Dont worry so much about dvd cd getting ruined. because everything you have can be re-obtained . If something does happen,GOD FORBID. your fellow members here will help you get back what you lost. One way or another it will get replaced. Take a breather and just play some games , watch a movie , go on a date, or anything that dont involve being online reading too much into one thing .
The following users thank cp32 for this useful post: opticalmediafan (01-26-2017)
  #5  
  01-26-2017, 05:47 AM
 
Member Removed / Locked / Why?
 

Stats: 37 posts since Nov 2016
Thanks: 0 times in 0 posts
How likely is a Geotrichum fungus or other fungus to develop and eat corrode the polycarbonate, glue and dye of the DVD / CD / MDisc? Did you see the photos I posted? Fingerprint at the center and edge of the disc will cause this problem to be stored in the long term?
  #6  
  01-26-2017, 02:57 PM
cp32's Avatar
Gramma of CPS
 
Location: ohio, USA.
Stats: 4,271 posts since Jun 2005
Status: Verified Member
Thanks: 22 times in 21 posts
Send a message via Yahoo to cp32
Wipe the print off the disc, make another copy, put it in case forget it about ,let it go....enough already...all your going to accomplish by past expeirence with LS is hes either 1) make him angry wont waste time responding..2)lock your thread) 3 get fed up send you packing....Take heed young jedi...Time to move on and drop it. This has nothing to with trading on here, or video tech help, case art , or collecting..Its just getting ridiculous...he will blow a gasket.But dont take my word for it.Learn the hard way my friend lol

Last edited by cp32; 01-27-2017 at 09:25 AM.
The following users thank cp32 for this useful post: opticalmediafan (01-27-2017)
  #7  
  01-28-2017, 05:34 AM
 
Member Removed / Locked / Why?
 

Stats: 37 posts since Nov 2016
Thanks: 0 times in 0 posts
Quote:
Originally Posted by cp32 View Post
Wipe the print off the disc, make another copy, put it in case forget it about ,let it go....enough already...all your going to accomplish by past expeirence with LS is hes either 1) make him angry wont waste time responding..2)lock your thread) 3 get fed up send you packing....Take heed young jedi...Time to move on and drop it. This has nothing to with trading on here, or video tech help, case art , or collecting..Its just getting ridiculous...he will blow a gasket.But dont take my word for it.Learn the hard way my friend lol
If I keep the fingerprint in the center of the mdisc and dvdr will create fungus, to create the fungus the polycarbonate has to be organic or inorganic, polycarbonate is a plastic

I keep my discs in black cases of dvd in a ventilated place but on rainy days the humidity is high anywhere, on those rainy days the fungus grows?
  #8  
  01-30-2017, 02:13 AM
lordsmurf's Avatar
Site Staff – Forum Moderator
 
Arcade Wins: Asteroids Champion Minigolf Champion People on Fire Champion
Location: The Smurfs Village
Stats: 9,731 posts since May 2005
Status: Moderator
Thanks: 126 times in 112 posts
Fungus grows everywhere. The human body has fungus that naturally lives on it, such as tinea versicolor and "athlete's foot". But not all fungus wants to eat CD dye. In fact, almost none does. It's not hospitable compared to other things with lesser paths of resistance.

I've seen horror movies/shows where a fungus/bacteria/whatever can eat your whole body in minutes.
^ And that's on topic to this site.

Your plan sounds fine to me. Keep the discs clean and dark. You collection will be fine.
__________________
The LS Collection:. My Cartoon and TV Show List | My Want List | My Future Projects
  #9  
  01-30-2017, 03:55 AM
 
Member Removed / Locked / Why?
 

Stats: 37 posts since Nov 2016
Thanks: 0 times in 0 posts
Quote:
Originally Posted by lordsmurf View Post
Fungus grows everywhere. The human body has fungus that naturally lives on it, such as tinea versicolor and "athlete's foot". But not all fungus wants to eat CD dye. In fact, almost none does. It's not hospitable compared to other things with lesser paths of resistance.

I've seen horror movies/shows where a fungus/bacteria/whatever can eat your whole body in minutes.
^ And that's on topic to this site.

Your plan sounds fine to me. Keep the discs clean and dark. You collection will be fine.
my doubts:
1 Does any fungus eat cd / dvd / bluray / mdisc polycarbonate?
2 Does some fungus eat the glue of cd / dvdr / bluray / mdisc?
3 some fungus only eats the organic dye from cd / dvd / bluray / mdisc

4 About cd / dvd / mdisc storage i keep these discs inside black dvd cases and cases inside boxes in an open and ventilated room but on rainy days the humidity is high anywhere on rainy days the humidity goes Cause fungal growth on discs?

5 Is there a problem if I leave the fingerprint in the center of the disc?
  #10  
  01-30-2017, 04:09 AM
cp32's Avatar
Gramma of CPS
 
Location: ohio, USA.
Stats: 4,271 posts since Jun 2005
Status: Verified Member
Thanks: 22 times in 21 posts
Send a message via Yahoo to cp32
Ls, Im ready to choke both of you for keeping this thread going and waking me up at 5am.Gir !
  #11  
  01-30-2017, 12:53 PM
lordsmurf's Avatar
Site Staff – Forum Moderator
 
Arcade Wins: Asteroids Champion Minigolf Champion People on Fire Champion
Location: The Smurfs Village
Stats: 9,731 posts since May 2005
Status: Moderator
Thanks: 126 times in 112 posts
Quote:
Originally Posted by cp32 View Post
Ls, Im ready to choke both of you for keeping this thread going and waking me up at 5am.Gir !
Unsubscribe from this one thread.

Although our Brazilian friend does get OCD on the topic of optical disc death, some of his points are valid. By responding to his posts, in several forums, I've been able to further educate and debunk myths.

Somebody always has to be first, when asking stupid questions, right?

You've asked some doozies in your day, too.

But rather than be an internet troll, or ridicule, as he's faced in so many other forums, I'd rather answer. I'm a believer in education, and several of my close friends are also teachers. He's being no more daft than a graderschooler. Just somewhat OCD, and doesn't know when the conversation is over.

And this fungus topic is over.
__________________
The LS Collection:. My Cartoon and TV Show List | My Want List | My Future Projects
The following users thank lordsmurf for this useful post: cp32 (01-30-2017)
Closed Thread
Thread Tools

All times are GMT -6. The time now is 02:41 AM  —  vBulletin Copyright © Jelsoft Enterprises Ltd

Contact Us   -   Top of Page   -   Site Home   -   Forum Home   -   Archive   -   Forum Policies